Core Infrastructure System Administrator (System Administrator 3)- Fremont, CA

About M.C. Dean 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, we deliver 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 and are committed to building the next generation of technical leaders in electrical, engineering, and cybersecurity industries. Position Overview Core Infrastructure System Administrator (System Administrator 3). Part of the Security and Electronic Systems (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 across high‑growth markets. Responsibilities Maintain production systems, software, hardware, and end devices. Install, configure, maintain, and support physical and cloud‑based Windows and Linux servers. Ensure the security, integrity, and availability of systems. Monitor operational systems for errors and alerts. Troubleshoot, add, configure, and remove technologies related to access control, intrusion detection, emergency, video, and other security systems. Document daily functions and troubleshooting processes to create and revise playbooks. Work Schedule May require extended hours or weekend support. On‑site requirements are subject to change and could increase at any time. Qualifications Education: Associate’s Degree and 8+ Years of progressive experience Bachelor’s Degree and 5+ Years of progressive experience High School Diploma or Equivalent and 10+ Years of progressive experience Requirements System administrator experience performing triage, resolving system problems, analyzing system data, implementing new workstations, and system extensions. 2+ years of experience programming or administering Physical Access Control Systems. Experience effectively managing small teams. Understanding of Windows patching and vulnerability remediation. Advanced knowledge of Windows Active Directory hierarchy and implementation. Basic knowledge of large‑scale networking, VLANs, and routing. Reliable attendance at customer site during required work hours. Ability to work flexible shifts that include nights, weekends, and holidays as needed. Minimum of one security certification (Security+, CASP, or CISSP). Background working with multidisciplinary teams. Time management and organization skills to meet deadlines and quality objectives. Proficiency in MS Excel, Word, Visio, and PowerPoint. Travel Up to 25% annual travel. What We Offer A collaborative team inspired by engineering and innovation to enhance customer outcomes and improve lives. An opportunity to lead and build a business with support from an industry‑leading firm with 75 years of experience. Investment in your skills through professional and technical training programs, including leadership training and tuition reimbursement. Open and transparent communication with senior leadership and local office management. Benefits Package Competitive salary Medical, dental, vision, life, and disability insurance Paid time off Tuition reimbursement 401(k) retirement plan Military reserve pay offset Paid maternity leave Abilities Extended exposure to computer screens. Sitting for extended periods of time. Reach by extending hands or arms in any direction. Finger dexterity for manipulating objects such as keyboards. Listening and understanding spoken information. Communicating information verbally for clarity. Reading and understanding written information. Applying general rules to specific problems to produce logical answers. Identifying and understanding another person's speech. Pay Range USD $114,640.00 - USD $171,960.00 / Yr. #J-18808-Ljbffr M.C. Dean, Inc.