M365 Platform Engineer

• Provide Tier-3 engineering support for Microsoft 365 GCC, Exchange Online, hybrid Exchange Server, and SharePoint Online environments, ensuring platform availability, performance, and security.
• Manage, monitor, restore, and optimize enterprise email and messaging services, including mailbox services, transport, retention, and e-discovery capabilities.
• Support SharePoint Online platform operations, including site collections, permissions, integrations, and collaboration workloads aligned with enterprise messaging services.
• Plan, test, execute, and support upgrades, patches, and migrations across cloud and hybrid environments while minimizing user impact and service disruption.
• Perform break-fix restoration, root cause analysis, and complex incident resolution in coordination with incident management and cybersecurity teams.
• Support the segregation and elimination of malicious software and spam traffic in accordance with security policies and directives.
• Develop and maintain technical documentation, standard operating procedures, and platform diagrams.

Ability to obtain and maintain a Public Trust is required. An active Public Trust and/or DHS suitability is preferred. Must be a U.S. Citizen without dual citizenship., * Bachelor's degree in Information Technology, Computer Science, or a related field or equivalent years of relevant experience.

• 5+ years supporting Microsoft enterprise collaboration platforms, including Microsoft 365, Exchange, and/or SharePoint in cloud or hybrid environments.
• Demonstrated experience administering Microsoft 365 (Government or Commercial) environments, including Exchange Online and hybrid Exchange Server, supporting large enterprise user populations (10,000+ users).
• Hands-on experience providing Tier-3 engineering support, including complex incident resolution, root cause analysis, service restoration, and execution of approved changes in production cloud and hybrid environments.
• Experience administering SharePoint Online, including site collections, permissions, governance controls, and integration with Microsoft 365 collaboration services.
• Experience planning and executing upgrades, patches, and migrations for enterprise messaging and collaboration platforms.
• Working knowledge of email security and malware mitigation, including spam filtering, malicious content isolation, and alignment with cybersecurity policies and NIST SP 800-53 controls.
• Ability to obtain and maintain a Public Trust (or higher) clearance.

Preferred Skills and Qualifications:

• Microsoft 365 certification
• Hands-on experience with Microsoft 365 GCC or other regulated government cloud environments.
• Experience supporting large-scale hybrid Exchange deployments.
• Strong understanding of email security, spam filtering, and malware mitigation.
• Experience with SharePoint Online administration and integration with Teams and Exchange.
• Familiarity with ServiceNow or similar ITSM platforms.
• Experience operating in a 24x7x365 enterprise operations environment.

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$80,000

Maximum Salary

$120,000

Maximus is a trusted federal partner supporting mission-critical programs across national security, defense, and public service delivery. Our work focuses on sustaining, operating, and improving essential government systems and services, with proven operational excellence, and a commitment to mission success for our customers. Joining Maximus means becoming part of a collaborative, mission-driven organization where teamwork, accountability, and professional growth are core to how we operate. We invest in our workforce through training, education, and career development, empowering professionals to deliver high-impact solutions while contributing to outcomes that matter at a national scale. This position is contingent upon contract award and position availability. Selected candidates will receive a contingent offer of employment, which will become final only upon successful contract award to Maximus, availability of the position, and receipt of authorization to proceed.