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Senior Microsoft O365 Security Engineer & Subject Matter Expert

Jobs via Dice
Washington, DC Full Time
POSTED ON 4/9/2026
AVAILABLE BEFORE 5/7/2026
Dice is the leading career destination for tech experts at every stage of their careers. Our client, Protos IT, is seeking the following. Apply via Dice today!

Job Title: Senior Microsoft O365 Security Engineer & Subject Matter Expert

Location: Washington, DC or Hybrid (1 day per week onsite/remote)

Duration: 6 Months Contract to fulltime hire

Primary Responsibilities

  • Provide strategic guidance, oversight and technical leadership for the organization s M365 application deployment across IT/OT environments
  • Implement and manage security solutions and compliance controls across the multi-tenant M365 ecosystem (MS Defender, Purview, Entra, Intune, One Drive, SharePoint, Teams)
  • Provide technical oversight and SME to MS Defender (EDR & Email Security), Purview (DLP & Compliance and Governance) activities and initiatives
    • Develop and implement strategies to MS Defender and Purview across on-Premise and Cloud environments (Azure & AWS)
    • Architect, design, and enhance MS Defender and Purview solutions and technologies
    • Perform risk assessments to identify gaps in MS Defender and Purview coverage
    • Research latest trends and threats in MS Defender and Purview and evasion techniques
    • Detailed understanding of M365 security products and tools
  • Interface with USMINT division stakeholders and facilitate technical working group/interchange meetings
  • Develop technical artifacts as part of M365 application deployment (requirements, architecture, test plan/scripts, implementation plans)
  • Collaborate with cross-functional teams to include Program/Project Management, M365 administrators, Data Center team, End User team, Security Engineering team, Security Operations Center (SOC), Compliance, and System Owners in the design and implementation of M365 security solutions
  • Apply systems & software development lifecycle in the development of design, test, and implementation artifacts
  • Coordinate with vendors and conduct analysis of alternatives (AoA) in evaluating M365 security solutions, controls and support Proof of Concept implementations
  • Develop scope, cost estimates, and implementation schedules for the deployment of M365 applications
  • Participate in the US Mint s business continuity and Information Technology Disaster Recovery planning

Basic Qualifications

  • Ability to obtain Public Trust clearance
  • 10 years of experience providing technical leadership, guidance, and oversight for M365 security administration & deployments, security controls/compliance, telemetry, automation, and optimization
  • Strong hands-on experience designing and implementing end-to-end M365 security solutions across on-premises, hybrid, and cloud IT/OT environments
  • Possess strong technical knowledge of the M365 security architecture and security tools to include MS Defender, Purview, Entra, Intune, Sentinel, SharePoint, Teams
  • Experience utilizing MS Purview for data governance, DLP policy implementation, and eDiscovery
  • Experience utilizing MS Intune for GPO policy management
  • Experience deploying and managing MS Defender for threat protection
  • Experience configuring Entra ID for identity and access management
  • Experience with O365 integration, Azure AD, cloud services and security
  • Understanding of compliance requirements and security frameworks (NIST, ISO 27001, SOC2)
  • Proficiency in documenting and maintaining technical reports, procedures, architecture diagrams, and other relevant artifacts
  • Knowledge of threat vectors, vulnerabilities, risk assessment, and incident detection and response as part implementing M365 security controls
  • Ability to deliver formal presentations to the customer and stakeholders
  • Proven ability to work independently and as part of a collaborative environment
  • Excellent analytical, problem-solving, verbal and communications skills
  • Proficiency in PowerShell
  • Microsoft 365 administrator certifications such as MS-102, MS-900

Salary.com Estimation for Senior Microsoft O365 Security Engineer & Subject Matter Expert in Washington, DC
$212,853 to $272,417
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