M365 & Identity Engineer

Amentum; United States; Remote; USD 100,000 - 126,000; Full time

Benefits offered by this job

Health insurance

401(k) matching

Educational reimbursement

Parental leave

Employee stock purchase plan

Disability and life insurance

Pet insurance

Job summary

Amentum is seeking a M365 & Identity Engineer to design, deploy, and optimize Microsoft 365 and IAM across hybrid environments. The role requires hands-on M365 configuration, automation, and identity lifecycle management, with Entra ID and Okta experience, plus strong security practices.

The position is US remote telework, requiring US citizenship. The candidate should have 5+ years of experience, a related bachelor's degree, and a track record of securing enterprise collaboration platforms.

Qualifications

• 5+ years of hands-on M365 administration and engineering with a Bachelor’s degree in a related field.
• Experience in Identity & Access Management in enterprise environments; Okta experience preferred.
• Experience supporting hybrid identity (On‑Premises Exchange, Entra ID Connect, federation, sync).
• US Citizenship is required.

Responsibilities

• Design, implement, and maintain M365 services including Exchange Online, Purview, OneDrive, Teams, and secondary support for SharePoint Online, Power BI, Power Platform.
• Manage Entra ID identity services including Conditional Access, External Identities (B2B), MFA, SSO integrations, and identity lifecycle processes.
• Manage Okta and other company identity platforms.
• Provide support for email platforms including Microsoft Exchange 2016/SE and Exchange Online.
• Develop and enforce M365 governance, security policies, and compliance configurations.
• Troubleshoot and resolve complex issues across M365, IAM, and hybrid environments.

Skills

PowerShell

Automation

IAM

Hybrid Identity

Entra ID

Conditional Access

MFA

RBAC

External Identities

Okta

Graph API

SSO integrations

M365 security

Education

Bachelor's degree in Computer Science

Bachelor's degree in Information Technology

Tools

Exchange Online

Purview

SharePoint Online

Teams administration

Entra ID

OKTA

Job description

Amentum is a global leader in advanced engineering and innovative technology solutions, trusted by the United States and its allies to address their most significant and complex challenges in science, security and sustainability. Our people apply undaunted curiosity, relentless ambition and boundless imagination to challenge convention and drive progress. Our commitments are underpinned by the belief that safety, collaboration and well‑being are integral to success. Headquartered in Chantilly, Virginia, we have approximately 50,000 employees in more than 70 countries across all 7 continents.

The M365 & Identity Engineer will be responsible for designing, deploying, optimizing, and supporting Microsoft 365 and Identity. This role blends advanced Office 365 engineering expertise with Identity and Access Management (IAM) skills to ensure a secure, resilient, and scalable collaboration environment. The ideal candidate brings hands‑on experience with Microsoft 365 configuration, automation, identity lifecycle management, Active Directory and Entra ID, and enterprise security best practices. Working in a cross-cloud infrastructure, M365 Commercial and GCC High is required. This position is US Remote telework and US Citizenship is required.

Key Responsibilities:

• Design, implement, and maintain M365 services including Exchange Online, Purview, OneDrive, Teams, and secondary support for SharePoint Online, Power BI, Power Platform, and related services.
• Manage Entra ID identity services including Conditional Access, External Identities (B2B), MFA, SSO integrations, and identity lifecycle processes.
• Manage Okta and other company identity platforms.
• Support for company Email service platforms, including Microsoft Exchange 2016/SE, Exchange Online, and Proofpoint.
• Develop and enforce M365 governance, security policies, and compliance configurations.
• Troubleshoot and resolve complex issues across the M365 ecosystem, identity platform, and hybrid environments.
• Administer and enhance IAM tools and workflows, including provisioning, deprovisioning, RBAC, and privileged access management.
• Implement automation using PowerShell or other scripting tools to improve operational efficiency.
• Monitor system performance, security posture, and capacity to ensure high availability and reliability.
• Partner with security, data center, and application teams to support integration and cross-functional initiatives.
• Provide technical expertise during audits, risk assessments, and incident response activities.
• Create and maintain technical documentation, diagrams, and standard operating procedures.
• Perform other duties as assigned.

Knowledge, Skills & Abilities:

• Proficiency with PowerShell and scripting for administration and automation.
• In-depth understanding of Microsoft 365 security, compliance, and governance tools (Purview, Defender, DLP, etc.).
• Solid knowledge of Exchange Online, Purview, SharePoint Online, Teams administration, and related services.
• Strong problem-solving skills and ability to work independently or in teams.
• Strong communication and collaboration abilities.
• Analytical mindset with attention to detail.
• Ability to manage multiple priorities in a fast‑paced environment.
• Customer‑focused and service‑oriented approach.

Required Qualifications:

• Typically, 5+ years of hands‑on experience with M365 administration and engineering with Bachelor's degree in Computer Science, Information Technology, or other related field.
• Experience in Identity & Access Management in enterprise environments. Okta experience preferred.
• Experience with Active Directory, Entra ID, External Identities (B2B), Conditional Access, RBAC, MFA, and identity lifecycle management.
• Experience supporting hybrid identity (On‑Premises Exchange, Entra ID Connect, federation, sync).
• US Citizenship is required.

Preferred Qualifications:

• Microsoft certifications such as MS-102, SC-300, SC-100, or AZ-104.
• Experience with Zero Trust frameworks and modern identity practices.
• Knowledge of identity governance solutions, including Okta.
• Familiarity with endpoint management (Intune) is a plus.
• Experience in creating automation workflows using Graph API or Power Automate.

Compensation Details:

$!00k - $126k

The compensation range or hourly rate listed for this position is provided as a good‑faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.

Benefits Overview:

Our health and welfare benefits are designed to support you and your priorities. Offerings include:

• Health, dental, and vision insurance
• Paid time off and holidays
• Retirement benefits (including 401(k) matching)
• Educational reimbursement
• Parental leave
• Employee stock purchase plan
• Tax‑saving options
• Disability and life insurance
• Pet insurance

Note: Benefi