System Administrator

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 7,000 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.

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 7,000 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.

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 Systems Administrator 1 to join our Security and Electronic Systems (SES) business Unit. As part of 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.

End date:
August 9th, 2026

In this role you will be working as part of a team to monitor, maintain, and test Physical Access Control, CCTV, PSIM and other electronic security systems and support implementation, troubleshooting and maintenance of Information Technology (IT) systems in support of the endpoint devices. The position provides Tier 1 helpdesk support.

• Provide assistance to end users in accessing and using IT systems.
• Answer Help desk phone calls; triage initial phone calls providing support and determine when escalation is required.
• Utilize technology-based problem tracking system (i.e., ticketing system) to document helpdesk phone calls; document troubleshooting steps prior to completing ticket and or escalating to next level of support.
• Monitor Enterprise system status for problems such as network outages and or degraded services; provide initial troubleshoot notify proper Sr. Level administrators when required.
• Support daily operations to include monitoring and reviewing system logs.
• Support configuration and management of Windows operating systems and install/load operating system software.
• Support desktop hardware and operating system set‑up, imaging software loading, and antivirus updates.
• Support execution of IAVA updates and patching to ensure compliance with Information Assurance (IA) standards.
• Support application of Security Technical Implementation Guides (STIGs) to Windows based operating systems (servers and workstations).
• Support installation, configuration, and maintenance of 3rd party applications.
• Performs root cause analysis on significant issues at appropriate level of support.
• Support preventive maintenance actions including system back‑ups, error log reviews, database size analysis, and integrity checks.
• Stay current with technological developments and make recommendations for ways to take advantage of new and emerging technology.
• Contribute to technical documentation such as standard operating procedures (SOP) and as builds for both technical and non‑technical audiences.
• P…