System Administrator II / System Administrator III – Hybrid – Chesterfield, MO (St. Louis)
About the role
Experitec is a company that values its employees and provides opportunities for growth and impact. We are seeking a dynamic systems professional who is passionate about enterprise infrastructure and driven to keep our technology environment secure, stable, and scalable.
Responsibilities
Administer and maintain Windows and Linux server environments.
Manage and support Active Directory, Group Policy, DNS, and DHCP.
Design, implement, and maintain enterprise infrastructure solutions.
Administer virtualization platforms.
Manage cloud environments (Microsoft Azure).
Configure and maintain backup, disaster recovery, and business continuity solutions.
Monitor system performance, capacity, and availability while proactively identifying and mitigating risks.
Provide as an escalation point on complex tickets from Tier 1 and 2.
Diagnose the underlying root cause.
Implement security best practices, vulnerability remediation, and system hardening.
Develop and maintain automation scripts using PowerShell, Bash, Python, or similar tools.
Evaluate new technologies and recommend infrastructure improvements.
Ensure compliance with organizational policies, security requirements, and regulatory standards.
Support high-availability and failover solutions for critical business systems.
Perform capacity planning and infrastructure optimization to support business growth.
Requirements
A high school diploma or equivalent.
Two or more years managing Windows Server in a production environment.
Five or more years of IT experience.
Three or more years as a System Administrator or equivalent.
Experience deploying or managing virtual machines in VMware (vCenter or ESXI).
Experience providing advanced technical support and serving as an escalation point for complex IT issues.
Experience diagnosing and resolving server, operating system, storage, virtualization, and network-related problems.
Ability to proactively identify business needs, troubleshoot, and resolve technical issues through creative problem solving.
Experience establishing project timelines and detailing key milestones and tasks to achieve objectives.
Experience administering and maintaining Windows and Linux server environments.
One or more years of experience managing and supporting Active Directory, Group Policy, DNS, or DHCP.
Experience designing, implementing, and maintaining enterprise infrastructure solutions.
Experience administering virtualization platforms.
Experience configuring and maintaining backup, disaster recovery, and business continuity solutions.
One or more years of experience monitoring system performance, capacity, and availability while proactively identifying and mitigating risks.
Experience leading root cause analysis efforts for critical incidents and recurring problems.
Experience implementing security best practices, vulnerability remediation, and system hardening.
Experience monitoring and managing patching, updates, and lifecycle maintenance of infrastructure components.
Experience developing and maintaining automation scripts using PowerShell, Bash, Python, or similar tools.
Ability to create and maintain technical documentation, standards, and operating procedures.
Experience planning and executing infrastructure upgrades, migrations, and deployment projects.
Ability to collaborate with network, security, cloud, and application teams on cross-functional initiatives.
Ability to support enterprise storage systems, SAN/NAS technologies, and data management platforms.
Ability to configure and maintain monitoring and alerting solutions.
Ability to evaluate new technologies and recommend infrastructure improvements.
Ability to ensure compliance with organizational policies, security requirements, and regulatory standards.
Ability to support high-availability and failover solutions for critical business systems.
Ability to perform capacity planning and infrastructure optimization to support business growth.
Ability to effectively communicate (written and verbal) with internal customers and co-workers and to provide strong customer support through proactive solution development and time management.
Ability to work Monday through Friday from 8am-5pm in the office three days per week and work remote two days per week.
Qualifications
Bachelor’s degree in IT, Computer Science, or related field (or equivalent experience).
Five or more years of experience in an MSP (Managed Service Provider) environment with broad exposure to multiple client environments.
Microsoft certifications (for example: Azure Administrator Associate, Microsoft 365 Certified: or Enterprise Administrator Expert).
CompTIA certifications (for example: Security+, Network+, and/or Server+).
ERP experience that is relevant to this position.
Experience managing Microsoft Azure cloud environments.
VMware and/or Hyper-V virtualization certifications.
Experience with identity and access management technologies (SAML, LDAP, OIDC, and/or SSO).
Experience with SIEM tools and log management platforms.
Familiarity with AI-driven security tools for behavioral threat detection, automated incident response, and/or intelligent patch prioritization.
Experience supporting enterprise AI integrations within Microsoft 365 environments, including Microsoft Copilot deployment and administration.
Understanding of infrastructure requirements for AI and machine learning workloads, including compute, storage, and networking considerations.
Experience using AI-assisted scripting and development tools (e.g., Microsoft Copilot, GitHub Copilot) to accelerate automation and reduce manual effort.
Familiarity with AI-powered AIOps and monitoring platforms for proactive anomaly detection and automated infrastructure remediation.
Possess comprehensive knowledge across these key areas of IT: Hypervisor/Virtual servers, IT Infrastructure support, Office365 Administration, and/or Microsoft Azure Administration.
Hands-on experience with an ERP in one or more functional areas (CRM, order management, manufacturing, inventory, service management, project management, finance, and/or HR).
Skills
Advanced troubleshooting expertise.
Advanced scripting skills (PowerShell, Bash, Python).
Advanced security and network maintenance.
Advanced documentation and knowledge transfer.
Advanced mentoring and leadership.
Advanced collaboration with cross-functional teams.
Benefits
No benefits information provided.
Pay
Salary range: $70,000 - $90,000 annually.
Schedule
Monday through Friday from 8am-5pm in the office three days per week and work remote two days per week.