Staff Mechanical Engineer

About the role

Trystar is a leader in power inverters, distribution equipment, and related services at the heart of supporting our electrical infrastructure. Our team members focus on producing the highest quality products in the industry and providing industry‑leading services. Safety and integrity are our guiding principles, and we work together to achieve excellence for our customers every day. Trystar’s team members are our most important asset.

We are in search of a Staff Mechanical Engineer who will lead our design efforts in Power Conversion Solutions to exceed customer expectations and achieve strategic and aspirational growth plans while following our values and guiding principles. In this role you will design and coordinate large‑scale engineering designs in a rapidly growing and increasingly central portion of Trystar’s enterprise‑wide business strategy. You will act as a trusted teammate to our R&D, internal, and external stakeholders, ensuring timely delivery, added value, and the easiest path to a solution in the industry.

This position is preferably based in Burnsville, MN; Houston, TX; Charlotte, NC; or Merrimack, NH and requires in‑person presence in the office. You will be responsible for the design and development of new technology offerings within the Research, Development & Engineering – Power Conversion team.

We look for people who embody our guiding principles and values:

• Safety – Everyone should leave Trystar facilities in the same or better condition than when they arrived.
• Integrity – We’re honest, transparent, and committed to doing what’s right.
• Customer focus – Relentless focus on our customers and their success.
• Right with speed – Good judgement, thoughtful decisions quickly, executed with purpose and intensity.
• Play for each other – Teamwork drives greatness.
• Champion change – Adaptation and improvement are required to survive and thrive.
• Enjoy the journey – An environment where the team feels appreciated and has fun.

Responsibilities

• Perform complete mechanical design, including layout, part/assembly modeling, drawings, and mechanical requirements definition.
• Support advanced engineering analysis, including system‑level thermal analysis, Finite Element Analysis (FEA), and Computational Fluid Dynamics (CFD) simulations.
• Define, design, prototype, validate, and support mechanical systems for products such as rack‑mounted equipment, modular power devices, UPSs, rectifiers, inverters, and more.
• Lead mechanical design reviews and provide technical guidance across multiple product lines at Trystar sites.
• Work with hardware design engineers to develop PCB mounting and packaging requirements.
• Develop detailed 3D CAD models and drawings, including complex surfaces, routed assemblies, and mechanical enclosures.
• Collaborate with cross‑functional teams (QA, Manufacturing, Assembly) to improve product designs, documentation, and manufacturability.
• Design and validate assembly and test fixtures; support prototype builds and production launches.
• Manage BOMs and documentation for new and existing parts using database tools (e.g., Empower, PDM, Epicor).
• Answer vendor questions regarding mechanical parts (change requests, obsolescence, substitution).
• Define and document mechanical requirements and best practices for enclosures of power conversion systems.
• Contribute to efforts to standardize design practices across sites.
• Provide technical mentorship and guidance to design engineers, test technicians, fabrication, and assembly personnel.

Requirements

• Bachelor’s degree in Mechanical Engineering or an equivalent.
• Minimum seven (7) years of experience as a mechanical design engineer, preferably in power electronics design/packaging.
• Experience with power electronic system design (electrical enclosures, panel layout, seismic considerations, heat management) within electrical equipment, heavy industry, or military sectors.
• Proficiency with major ERP and CAD systems (SolidWorks or equivalent).
• Working knowledge of industry codes and standards: ASME, NEMA, UL, IEC, and other applicable mechanical engineering standards.
• Proficient in generating and reviewing engineering documentation, including BOMs and detailed drawings for sheet metal, plastic, and extruded parts.
• Proficient with Microsoft Office applications and Microsoft Cloud services.
• Travel up to 20% within the USA and Canada.
• Experience with UL 1741, CSA C22.2, and other relevant certifications.
• Strong communication skills (oral, written, and presentation) with the ability to influence across all levels of the organization, including in‑person and remote interactions.
• Ability to adapt and thrive in a fast‑paced, evolving work environment.
• Professional Engineer (PE) license is a plus.
• Ability to excel working as the sole mechanical engineer on a project.
• Ability to create project requirements from incomplete inputs.
• Strong understanding of structural and thermal analysis (FEA/CFD tools such as SolidWorks Flow Simulation, ANSYS, COMSOL, or similar).