Electronic Security IT System Administrator; System Administrator - Fremont, CA

M.C. Dean is Building Intelligence®. We design, build, operate, and maintain cyber-physical solutions for the nation’s most mission-critical facilities, secure environments, complex infrastructure, and global enterprises. With over 9,000 employees, our capabilities span electrical, electronic security, telecommunications, life safety, automation and controls, audiovisual, and IT systems. Headquarters in Tysons, Virginia, M.C. Dean delivers resilient, secure, and innovative power and technology solutions through engineering expertise and smart systems integration.

Why Join Us? Our people are passionate about engineering innovation that improves lives and drives impactful change. Guided by our core values—agility, expertise, and trust—we foster a collaborative and forward-thinking work environment. At M.C. Dean, we are committed to building the next generation of technical leaders in electrical, engineering, and cybersecurity industries.

We are seeking a Electronic Security IT System Administrator (System Administrator
3) to join our Security and Electronic Systems (SES) business unit. As part of the SES Strategic Business Unit you will be part of a team that designs, engineers, integrates, operates, and maintains electronic security services inclusive of intrusion detection, access control, biometric authentication, video surveillance, audio visual, IT systems, perimeter defense, and command and control systems for federal, local and commercial customers.

Electronic Security IT System Administrator is a key member of the global technology team responsible for building and maintaining enterprise technology application systems.

• Maintaining production systems, software, hardware, and end devices.
• Installation, configuration, maintenance, and support of physical and cloud-based Windows and Linux servers.
• Ensuring the security, integrity, and availability of systems.
• Monitoring operational systems for errors and alerts.
• Troubleshooting, adding, configuring, and removing various technologies related to access control, intrusion detection, emergency, video, and other security systems.
• Document daily functions and troubleshooting process to create and revise playbooks.

• Requires the ability to work flexible shifts primarily consisting of an emergency on‑call weekend rotation, but could include nights, weekends and holidays as needed.
• On‑site requirements are subject to change and could increase at any time.

• Bachelor's Degree and 5+ years of progressive experience.
• Associate's Degree and 8+ years of progressive experience.
• HS Diploma or equivalent and 10+ years of progressive experience.

• Requires system administrator experience in performing triage on system problems, resolving the system problems, analyzing system data to prevent problems, implementing new workstations, and system extensions.
• 2+ years of experience programming/administrating Physical Access Control Systems preferred.
• Demonstrated previous experience effectively managing small teams.
• Demonstrated understanding of Windows patching and vulnerability remediation.
• Demonstrated advanced knowledge of Windows Active Directory hierarchy and implementation.
• Basic knowledge of large‑scale networking, VLANs and routing.
• Requires reliable attendance at customer site during work hours required by customer.
• Certifications in Windows (10, 11, Server 2016‑2025), AWS Cloud, Linux (Red Hat, CentOS, Docker, Kubernetes), Databases (SQL, Cassandra, Mongo, Redis), and Networking Protocols strongly preferred.
• Demonstrated background working with multidisciplinary teams.
• Demonstrated time management and organization skills to meet deadlines and quality objectives.
• Proficient in MS Excel, Word, Visio, and PowerPoint.

• Up to 25% annual.

• A collaborative team inspired by the way engineering and innovation enhance customer outcomes, improve lives, and change the world for the better. We are driven by our core values of agility, expertise, and trust.
• An opportunity to lead and build a business with the support of an industry‑leading firm that has been in business for 75 years.
• Investment in your skills and…