Sr Windows System Engineer/SME

This highly skilled Windows Infrastructure Engineer position will have experience in securing, scaling, and supporting core enterprise identity and access management platforms. In this role, the candidate will serve as the subject matter expert and highest-tier escalation point for our Active Directory (AD) environment and Azure Active Directory /Microsoft Entra ID cloud integrations. They will be responsible for engineering and architecting robust identity solutions, managing our Enterprise Public Key Infrastructure (PKI), and providing high-level tier -3 architectural support to ensure optimal security, compliance, and system availability across our hybrid environment. This technical resource will support and engage with the infrastructure team on the various tasks being supported by the team at a higher technical level. The position will set standards the rest of the team builds to and serve as an escalation point when an issue escalates to Tier 3 support. They may also provide hands-on support in program operations, configuration, deployment, maintenance, monitoring, maintenance and trouble-shooting activities. A summary of the areas they will provide and qualifications.

•                    Identify Architecture

•                    Security & PKI Management

•                    Cloud Design

•                    Azure Engineering, Administration, and Optimization

•                    Tier 3 Engineering and Trouble-shooting Support

•                    Access Governance

•                    Automation and Optimization

•                    Disaster Recovery

•                    Continuous Improvement

•                    Documentation Compliance

Required Qualifications:

• Bachelor’s degree (or equivalent) in computer science, information systems, engineering, or a related technical field, and eight (8) or more years of progressive Windows Infrastructure Engineer and Architect experience OR Master’s degree in a related field and at least 6 years of relevant experience in above areas. Equivalent experience can substitute for the degree.
• A minimum of six (6) years of experience in cloud operations, engineering, or related field.
• A minimum of three (3) years performing at a senior and lead level with design and architecture ownership for an enterprise Windows environment.
• Familiarity with federal compliance (NIST, FISMA, FedRAMP) and CIS 4.0 controls.
• Significant experience designing, operating and maintaining Microsoft Azure environments to include Zero Trust, hybrid cloud, and cross-domain architectures in mission environments.
• Experience with the configuration, deployment, and management of Microsoft Entra ID / Azure AD for centralized identity, single sign-on (SSO), and role-based access control (RBAC) across Azure tenants and subscriptions.
• Demonstrated experience with the integration of federated identity solutions with AWS Identity Center, Entra, or on-premises Active Directory.
• Develop and enforce Azure governance frameworks, including Azure Policy, Management Groups, and Blueprints, ensuring alignment with DoD Zero Trust and least-privilege principles.
• Experience with Azure Monitor and cost optimization strategies.
• Deep expertise in Microsoft Azure architecture, Microsoft Entra ID and on-prem interoperability.
• Ability to script in one more of the following computer languages PowerShell or others.
• Strong understanding of federated identity, modern authentication protocols (SAML, OIDC, OAuth 2.0), and cross-cloud authentication mechanisms.
• Deep expertise in Microsoft Azure architecture, Microsoft Entra ID and on-prem interoperability.
• Hands on experience with and knowledge of networking concepts (DNS, VPNs, load balancers, etc.) and cloud-based networking configurations.
• Configure, maintain and upgrade 2019, 2022, & 2025 servers operating systems by performing system administration tasks related to:
  • Microsoft Application installation and maintenance
  • 3rd Party software installation and maintenance

• Configure, maintain and upgrade physical and virtual server installations in FTC datacenters, to include:
  • OS installation and configuration
  • Out of Band management configuration (iLO, etc.)
  • Hardware installation/maintenance (network adapter, memory, hard drives, etc.)
  • RAID Configuration
  • Network adapter configuration
  • SCSI and Fiber Channel configuration

• Experience and ability to immediately contribute to Automation Tasks and Infrastructure-as-Code tools and templates.
• Provide experience designing, deploying, and maintaining Active Directory Certificate Services (AD CS)  / PKI environments.
• Applied knowledge of system security engineering, including CIS and STIG hardening, vulnerability management, and federal compliance frameworks (FISMA, NIST SP 800-53).
• Extensive experience with Visio or other networking diagram tools and solid understanding of Networking principles.
• Excellent troubleshooting skills with the ability to resolve complex technical issues in a timely manner.
• Strong problem-solving skills and ability to conduct root cause analysis.

• Actively participate in the process of reviewing and improving operational processes, procedures, technology, and documentation. Support the program team in efforts to improve service delivery to the customer. Adopt program directed procedural changes, process changes, and tool changes as required for the role.
• Perform work activities in accordance with program processes, procedures, and service level agreements.
• Support other anticipated requirements that will emerge and are reasonably aligned to the role supporting server elements of the infrastructure.

• Demonstrated ability to complete technical projects independently, with strong organizational skills and attention to detail.

• Create, monitor and drive to resolution change requests and trouble tickets for service level changes that affect Windows Servers and applications installed on Windows servers.

• Excellent written and verbal communication skills. This includes drafting SOPs and technical documentation as well as communication with senior program and customer leadership.

• Must be able to prepare data and presentations then active participation and presenting in Leidos and customer meetings as required.
• undefined
• Must be able to present designs, plans, courses of action, and analyses of alternatives to technical leadership personnel and boards for approvals.

• ServiceNow experience and review incoming ServiceNow tickets and work to resolve any incident tickets and service requests as assigned for:

o Server builds

o Server configuration changes

o Windows Permissions changes

o File Server ACL changes

• Application maintenance for: Symantec Endpoint Protection (Servers), Carbon Black Protection (Servers), DNS/DHCP Updates, & Active Directory (including Group Policy Objects).
• Maintain status of assigned tickets in accordance with program standards and program SLAs, including quality of status and timeliness of updates.

Required Certifications

• Current DoD 8570/8140 baseline certification appropriate for Intermediate System Administrator roles (e.g., Security+, GSEC, SSCP, or equivalent).

Preferred Certifications - Any other certifications in support of the stated work scope requirements is a plus such as:

·         Sumo Logic Certified Administrator

·         Sumo Logic Certified Security & Compliance

·         MCSA: Windows Server 2008.

·         MCITP: Enterprise Administrator.

·         MCSE: Security on Microsoft Win Server 2003.

·         MCSA: Security on Microsoft Win Server 2003.

·         MCSE: Security on Microsoft Win 2000.

·         MCSA: Security on Microsoft Win 2000.

·         MCSE on Microsoft Win Server 2003.

·         MCSA on Microsoft Win Server 2003.

·         MCSE on Microsoft Win 2000.

·         MCSA on Microsoft Win 2000.

·         Microsoft Certified Professional.

Clearance, Citizenship, and Work Conditions

• Background requirements: Must possess, or be eligible to obtain and successfully complete, a Public Trust background investigation and/or Public Trust clearance.
• Citizenship:  Must be a U.S. Citizen.
• Location:  Telework: Work primarily offsite with the need to support on site as needed to meet the needs of the program. Remote support from locations other than FTC must be approved by the Leidos TO4 Program Manager.
• Hours: FTC core hours, Monday through Friday, 8:00 a.m. to 5:00 p.m. EST, with occasional overtime, weekend work, or after-hours response to critical outages and scheduled maintenance windows. (Hybrid: Onsite 2x per week. Hours charged limited to no more than 40 hours per week, unless specifically approved by the Leidos TO4 Program Manager.
• Physical requirements: Ability to lift 50+ pounds.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

October 26, 2026

Pay Range:

Pay Range $107,900.00 - $195,050.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.