Senior Windows Systems Engineer - Enclave & Hybrid Infra

Leidos Inc; Chantilly (VA); On-site; USD 140,000 - 190,000; Full time

Job summary

Leidos is seeking a Senior Infrastructure Engineer to support mission-critical enclave environments across on-prem VMware and AWS cloud, in a high-security, high-availability ecosystem in Chantilly, Virginia. You will own, stabilize, and improve a hybrid infrastructure, driving reliability and performance forward in a fast-paced, validated setting.

This role requires deep hands-on expertise in Windows and virtualization, Active Directory, VMware, SCCM/WSUS, Exchange, and security tooling, with

Qualifications

• Active TS/SCI with Poly clearance required.
• Experience in Windows enterprise environments and high-availability systems.
• Ability to own and operate complex hybrid environments (on-prem + cloud).

Responsibilities

• Administer and maintain Windows-based infrastructure across enclave environments.
• Manage VMware vCenter / ESXi performance and VM lifecycle.
• Support AWS cloud infrastructure (EC2, VPC, storage, IAM).
• Maintain Active Directory, Group Policy, and identity systems.
• Oversee patching and system compliance via WSUS and SCCM.
• Administer Exchange and Citrix environments.
• Maintain DNS, networking, and core infra services.
• Support SAN storage environments and backup/recovery (Rubrik).
• Support and troubleshoot security platforms (e.g., Rapid7, Security Onion, Centrify).
• Perform deep-dive troubleshooting and root-cause analysis; maintain system docs and incident procedures.
• Identify and implement infrastructure improvements and automation opportunities.

Skills

High-security environment

Independent ownership

Troubleshooting

Windows enterprise experience

Tools

VMware vCenter / ESXi

AWS (EC2, VPC, storage, IAM basics)

Active Directory

SCCM / WSUS

Microsoft Exchange

Citrix

Rubrik

Security tooling (Rapid7, Security Onion, Centrify)

Job description

Leidos is seeking a Senior Infrastructure Engineer to support mission-critical enclave environments across on-prem VMware and AWS cloud, in a high-security, high-availability ecosystem in Chantilly, Virginia. You will own, stabilize, and improve a hybrid infrastructure, driving reliability and performance forward in a fast-paced, validated setting.

This role requires deep hands-on expertise in Windows and virtualization, Active Directory, VMware, SCCM/WSUS, Exchange, and security tooling, with