Staff M365 Platform Engineer & Owner

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Staff M365 Platform Engineer & Owner in United States.

This role provides a unique opportunity to lead and own a Microsoft 365 GCC High environment in a highly strategic, hands-on capacity. You will serve as the technical steward for all M365 workloads, driving architecture, configuration, automation, and governance while ensuring security and compliance. The position requires bridging high-level platform strategy with day-to-day engineering execution, including migrations, tenant consolidations, and complex mail flow designs. You will mentor teams, manage critical projects, and collaborate closely with cross-functional stakeholders to optimize the platform for enterprise performance and operational excellence. The role offers a blend of technical ownership, strategic influence, and impact in a dynamic and innovative environment.

• Serve as the primary technical owner for the M365 GCC High tenant, including Exchange, SharePoint, Teams, and Entra ID, ensuring high availability, compliance, and optimization
• Lead hands-on configuration, automation, and integration projects using PowerShell, Graph API, and other tools to support lifecycle management, security auditing, and site provisioning
• Implement governance controls aligned with policies, including DLP, Conditional Access, retention labels, and other compliance measures
• Manage tenant-to-tenant migrations, identity synchronization, and mail flow design during mergers, acquisitions, or consolidation events
• Validate and oversee vendor deliverables to ensure technical and compliance standards are met
• Provide Tier 3 support for complex technical issues, maintain technical documentation, runbooks, SOPs, and architecture diagrams
• Drive operational excellence by assessing new M365 features, system performance, and overall platform health

Requirements:

• 6–8+ years of experience managing Microsoft 365/Exchange Online in enterprise environments, with proven GCC High expertise
• Hands-on experience with Entra ID/Azure AD, including identity synchronization, application registration, and security/compliance configurations
• Expert-level PowerShell skills and experience with Graph API for automation and lifecycle management
• Experience leading or executing at least one major tenant-to-tenant migration
• Knowledge of compliance frameworks such as NIST 800-171, CMMC, or DFARS 7012
• Bachelor’s degree in Computer Science, Information Systems, or related technical field
• Must be a U.S. Citizen and eligible to obtain and maintain a U.S. government security clearance (Secret or higher) if required
• Preferred certifications: Microsoft 365 Administrator Expert, Messaging Administrator Associate, Microsoft Identity and Access Administrator (SC-300), CompTIA Security+, CySA+, or CASP+

Benefits:

• Competitive salary range with bonus and equity opportunities
• Comprehensive medical, dental, and vision coverage
• 401(k) matching and retirement savings programs
• Unlimited PTO and paid holidays
• Parental/adoption leave and legal insurance support
• Home office and technology setup allowance
• Flexible remote work options and occasional travel for team meetings
• Collaborative and inclusive work environment focused on employee growth, autonomy, and well-being