Senior System Administrator - Security & IT Systems

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

Benefits offered by this job

Medical Insurance

Dental Insurance

401k Plan

Paid Time Off

Tuition Reimbursement

Maternity Leave

Job summary

M.C. Dean in the Washington, DC area seeks a System Administrator 4 to support SES, providing design, implementation, operations, and cybersecurity for complex hardware and virtualized infrastructure.

The role requires on-site presence at a single location, with up to 10% travel, and a Top Secret with SCI clearance; you will configure and maintain Windows AD, VDI, and security controls to ensure resilient operations.

Qualifications

• Security clearance: TS with SCI and polygraph eligibility required.
• 7+ years progressive experience in system administration or related field.
• 2+ years of experience with Physical Access Control Systems.
• Experience leading small teams and MS Office proficiency.

Responsibilities

• Monitor, maintain, and test security systems including physical access and CCTV.
• Manage Windows servers, AD, imaging, and antivirus updates.
• Support IT infrastructure with VDI, VMware, Citrix Xen Desktop.
• Perform system troubleshooting and root cause analysis.

Skills

Active Directory

Windows Patch Management

VLANs & Routing

RMF Knowledge

Education

Bachelor's Degree

Associates Degree

HS Diploma

Tools

ACAS

HBSS

STIGs

eMASS

Job description

M.C. Dean in the Washington, DC area seeks a System Administrator 4 to support SES, providing design, implementation, operations, and cybersecurity for complex hardware and virtualized infrastructure.

The role requires on-site presence at a single location, with up to 10% travel, and a Top Secret with SCI clearance; you will configure and maintain Windows AD, VDI, and security controls to ensure resilient operations.