Senior Windows SysAdmin (TS/SCI Poly) | Flexible Schedule

Leidos; Corridor North (MD); On-site; USD 116,000 - 210,000; Full time

Benefits offered by this job

Paid Time Off

11 holidays

401K with company match

Flexible schedules

Discounted stock purchase plans

Technical upskilling

Education and training support

Parental paid leave

Job summary

Leidos is seeking a Senior Windows System Administrator to join a high-performing Agile team operating within SAFe in support of a fast-paced program. The role spans daily systems administration, O&M, and deployment of new capabilities across VMware, Windows, Linux, and VDI environments.

The candidate will manage AD, DNS, SCCM, Exchange, and security operations, with a focus on vulnerability remediation, IAVA management, and incident response. TS/SCI with Polygraph clearance is required.

Qualifications

• Bachelor’s degree in Computer Science or IT with 12+ years of relevant experience.
• At least 7 years of Windows administration experience.
• 7+ years in information security governance, risk management, and compliance.
• 5+ years with AD/DNS, GPOs, SCCM, and Exchange administration.

Responsibilities

• Monitor and maintain Windows server and network infrastructure across locations.
• Configure and secure servers, routers, switches, and firewalls; manage AD and DNS.
• Lead vulnerability management, patching, and IAVA remediation activities.
• Respond to security events; perform system scans and maintain documentation.
• Provide Tier-3 support to users and interdepartmental teams; on-call as needed.
• Develop and maintain runbooks, change control, and system documentation.

Skills

Windows Admin

Information Security

PowerShell

IAVA management

VMware

AD / DNS

GPOs

SCCM

Exchange

Networking

Education

Bachelor’s degree in CS/IT

Tools

Ansible

SaltStack

VMware

Job description

Leidos is seeking a Senior Windows System Administrator to join a high-performing Agile team operating within SAFe in support of a fast-paced program. The role spans daily systems administration, O&M, and deployment of new capabilities across VMware, Windows, Linux, and VDI environments.

The candidate will manage AD, DNS, SCCM, Exchange, and security operations, with a focus on vulnerability remediation, IAVA management, and incident response. TS/SCI with Polygraph clearance is required.