Senior Microsoft O365 Security Engineer & Subject Matter Expert
Jobs via DiceRole Overview
Jobs via Dice is hiring a Senior Microsoft O365 Security Engineer & Subject Matter Expert. This is a contract hybrid role, based in Washington. Part of Jobs via Dice's Lifecycle hiring. Full responsibilities, required qualifications, and the apply link are listed in the description below.
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Job Description
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
Frequently Asked Questions
How do I apply for the Senior Microsoft O365 Security Engineer & Subject Matter Expert position at Jobs via Dice?
Use the Apply button above to submit your application directly to Jobs via Dice. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.
Is the Senior Microsoft O365 Security Engineer & Subject Matter Expert role at Jobs via Dice remote or in-office?
This is a hybrid role based in Washington. Expect a mix of in-office and remote days, with the specific cadence set by the hiring manager.
What does a Senior Microsoft O365 Security Engineer & Subject Matter Expert at Jobs via Dice earn?
Jobs via Dice has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.
When was the Senior Microsoft O365 Security Engineer & Subject Matter Expert role at Jobs via Dice posted?
This role was posted on April 7, 2026 (62 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.
How much experience does the Senior Microsoft O365 Security Engineer & Subject Matter Expert role at Jobs via Dice require?
This is a senior-level position. Most senior roles call for 5+ years of directly relevant experience. Jobs via Dice lists their specific requirements in the description below, so review the must-have qualifications closely before applying.
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