Senior Microsoft O365 Security Engineer & Subject Matter Expert

About

We have an outstanding contract position for a Senior Microsoft O365 Security Engineer & Subject Matter Expert to join a leading company located in the Washington, DC surrounding area.

• Pay Rate: $84.05 per hour
• US Citizenship is required.
• Candidate must be able to obtain and maintain a Public Trust.

The Cybersecurity Operations Support Services Program needs a Senior Microsoft O365 Security Engineer & SME to design and manage the implementation of Microsoft O365 security solutions across customer IT/OT environments. The engineer will provide specialized expertise in configuring and deploying Microsoft 365 applications to secure the customer's infrastructure, handling security configurations, compliance, identity and access management, and incident response across the Microsoft 365 ecosystem.

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, OneDrive, SharePoint, Teams).
• Provide technical oversight and SME to MS Defender (EDR & Email Security) and Purview (DLP & Compliance and Governance) activities and initiatives.
• Develop and implement strategies for 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 the latest trends and threats in MS Defender and Purview, and evasion techniques.
• Maintain detailed understanding of M365 security products and tools.
• Interface with 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—including Program/Project Management, M365 administrators, Data Center team, End User team, Security Engineering team, 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 PoC implementations.
• Develop scope, cost estimates, and implementation schedules for the deployment of M365 applications.
• Participate in the customer’s business continuity and IT disaster recovery planning.

Basic Hiring Criteria

• Bachelor of Science degree in Information Technology, Computer Science, or an engineering‑related discipline, and 10 years of relevant experience.
• Must be a U.S. citizen and able to obtain Public Trust clearance.
• Minimum 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.
• Strong technical knowledge of the M365 security architecture and tools including MS Defender, Purview, Entra, Intune, Sentinel, SharePoint, and Teams.
• Experience with MS Purview for data governance, DLP policy implementation, and eDiscovery.
• Experience with 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, SOC 2).
• Proficiency in documenting and maintaining technical reports, procedures, architecture diagrams, and other relevant artifacts.
• Knowledge of threat vectors, vulnerabilities, risk assessment, and incident detection/response as part of implementing M365 security controls.
• Ability to deliver formal presentations to customers and stakeholders.
• Proven ability to work independently and as part of a collaborative environment.
• Excellent analytical, problem‑solving, verbal, and communication skills.
• Proficiency in PowerShell.
• Microsoft 365 administrator certifications (e.g., MS‑102, MS‑900).

Benefits

• Direct deposit
• Free career counseling services
• 401(k)
• Select paid holidays
• Short‑term disability insurance
• Skills training
• Employee referral bonus
• Affordable medical coverage plan
• DailyPay (in some locations)

Benefits may vary by contract assignment.