MS365 Engineer Senior provides senior engineering and operational support for Microsoft 365 services under the SEC ISS contract, enabling secure and resilient collaboration across the SEC enterprise. This role designs, implements, and administers Microsoft 365 GCC (G5) capabilities including Exchange Online, SharePoint Online, Teams, and Microsoft Entra ID to support SEC OIT modernization goals. The position leads automation and migration efforts, improves platform performance, and enforces zero-trust-aligned security and compliance controls. The engineer partners with infrastructure, cybersecurity, and service delivery teams to resolve complex issues and sustain SLA-based service outcomes in alignment with PWS 3.5.8 for Microsoft 365 GCC services and PWS 4.2.2 for service-level performance outcomes.
PRIMARY RESPONSIBILITIES
Microsoft 365 Service Engineering and Operations
- Design, implement, and manage Microsoft 365 services and solutions, including Exchange Online, SharePoint Online, Teams, and related collaboration workloads.
- Administer tenant configuration, policies, service settings, and lifecycle updates across Microsoft 365 GCC (G5) environments.
- Monitor platform health, availability, and performance using Microsoft 365 Admin Center and approved enterprise monitoring tools.
- Provide advanced troubleshooting and Tier 2/3 escalation support for complex service incidents and outages.
Identity, Access, and Security Compliance
- Engineer and support Microsoft Entra ID services for identity and access management across Microsoft 365 workloads.
- Implement and maintain secure identity lifecycle processes, authentication, authorization, and directory governance controls.
- Ensure Microsoft 365 services align with SEC security requirements and federal compliance frameworks, including FISMA and FedRAMP-aligned controls.
- Support identity and access policy enforcement, audit readiness, and continuous compliance activities.
Automation, Migration, and Platform Optimization
- Develop and maintain PowerShell automation for provisioning, administration, reporting, and operational consistency.
- Plan and execute Microsoft 365 migration and modernization activities in large-scale enterprise environments with minimal user disruption.
- Optimize Microsoft 365 configurations for scalability, reliability, security, and operational efficiency.
- Produce and maintain technical documentation, runbooks, architecture artifacts, and change implementation records.
Service Management and Cross-Functional Delivery
- Coordinate incident, problem, and change management activities with SEC service delivery, EOC, and infrastructure teams.
- Perform root cause analysis and implement corrective actions to reduce recurring issues and improve service reliability.
- Contribute to SLA metric reporting, operational dashboards, and continuous service improvement actions.
- Collaborate with stakeholders to align Microsoft 365 capabilities with mission needs, user productivity, and compliance objectives.
REQUIRED QUALIFICATIONS
Applicants must not hold dual citizenship with any other country to be eligible for work under this contract.- Ability to obtain and maintain SEC Public Trust.
- Bachelors in Information Technology, Computer Science, Engineering, or a related field and 4+ years of experience in Microsoft 365 administration and engineering roles. In lieu of degree, additional years experience required.
- Strong expertise in Microsoft 365 services, PowerShell scripting, and Microsoft Entra ID (Azure AD) identity management.
- Experience delivering security, compliance, and migration initiatives in large-scale enterprise environments.
- Microsoft 365 services administration and engineering (Exchange Online, SharePoint Online, Teams)
- Microsoft Entra ID (Azure AD) identity and access management
- PowerShell scripting and automation for platform administration and operations
- Security and compliance implementation for Microsoft 365 in enterprise environments
- Migration planning, execution, and advanced troubleshooting for Microsoft 365 workloads
PREFERRED QUALIFICATIONS
- Experience supporting federal civilian agency environments with strict security and audit requirements.
- Experience implementing and supporting Microsoft 365 Copilot and Copilot Studio capabilities.
- Expertise in Microsoft Purview eDiscovery, DLP, and records/information protection governance.
- Experience integrating Microsoft 365 operations with ITSM workflows and SLA reporting dashboards.
- Current advanced Microsoft cloud certifications relevant to Microsoft 365 and identity/security administration.
- Microsoft 365 Certified: Enterprise Administrator Expert
- Microsoft Certified: Identity and Access Administrator Associate (SC-300)
- Microsoft Certified: Security Administrator Associate (MS-500)
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:April 21, 2026
For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Pay Range:Pay Range $87,100.00 - $157,450.00
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.
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