Senior System Administrator - Security & IT Infrastructure

Unofficial M.C. Dean; Chantilly (VA); On-site; USD 125,000 - 172,000; Full time

Benefits offered by this job

Competitive salary

Medical, dental, vision, life and DIS

401k Retirement Plan

Tuition reimbursement

Job summary

M.C. Dean is seeking a System Administrator 4 to join its Security and Electronic Systems team in the Washington DC area.

The role focuses on maintaining physical security, IT infrastructure, and cybersecurity for complex systems, with responsibilities spanning Windows, AD, virtualization, and VDI platforms. The ideal candidate has Top Secret with SCI clearance (polygraph preferred) and extensive experience in DoD-related IT security and system administration.

Qualifications

• Bachelor's degree plus 7+ years of progressive experience or equivalent.
• 2+ years in programming/administrating Physical Access Control Systems.
• Active Top Secret with SCI and ability to obtain a polygraph.

Responsibilities

• Monitor, maintain, and test physical security, CCTV, PSIM and related IT systems.
• Provide Tier 2 escalation support for IT issues at the Washington DC area site.
• Configure and manage Windows OS, imaging, and antivirus updates.
• Maintain Active Directory, VMware/Hypervisor, and VDI platforms (Citrix).
• Create SOPs, document procedures, and train users as needed.

Skills

Physical Access Control Systems

Windows patching

Active Directory

Networking basics (VLANS & routing)

MS Office Suite (Excel/Word/Visio/PP)

Team leadership

Security+ / CASP / CISSP (cert)

DoD RMF / NIST 800-53

Education

Bachelor's Degree

Associates Degree

High School Diploma or Equivalent

Tools

ACAS

HBSS

eMASS

STIGs Tools

Job description

M.C. Dean is seeking a System Administrator 4 to join its Security and Electronic Systems team in the Washington DC area.

The role focuses on maintaining physical security, IT infrastructure, and cybersecurity for complex systems, with responsibilities spanning Windows, AD, virtualization, and VDI platforms. The ideal candidate has Top Secret with SCI clearance (polygraph preferred) and extensive experience in DoD-related IT security and system administration.