Sr. Engineering Systems Administrator - Microsoft 365

Sr. Engineering Systems Administrator – Microsoft 365

Location:

Irvine, CA 92614 (5 days on-site)

• Design and implement enterprise‑grade Microsoft 365 solutions, including Exchange Online, SharePoint Online, One Drive, Microsoft Teams, and Entra .
• Lead architecture decisions for hybrid and cloud‑first environments.
• Develop and maintain identity and access strategies (SSO, MFA, Conditional Access).

• Manage and maintain the M365 tenant, ensuring high availability and performance.
• Oversee user lifecycle management, licensing, and service configurations.
• Monitor service health and proactively resolve issues.

• Implement and manage security solutions including Microsoft Defender and compliance tools.
• Configure Data Loss Prevention, retention policies, eDiscovery, and insider risk controls.
• Ensure adherence to security standards and regulatory requirements.

• Administer Entra  (Azure AD), including Conditional Access, identity protection, and RBAC.
• Manage hybrid identity integrations with on‑prem Active Directory.
• Implement modern authentication and certificate‑based access.

• Optimize Microsoft Teams, SharePoint, and One Drive for business productivity.
• Establish governance for collaboration tools, including lifecycle management and external sharing.
• Support automation initiatives using Power Platform.

• Lead migrations to Microsoft 365 from on‑prem or third‑party platforms.
• Integrate M365 services with enterprise applications and SaaS platforms.

• Develop automation using Power Shell and Microsoft Graph API.
• Improve operational efficiency through scripting and process automation.

• Serve as escalation point for complex technical issues.
• Conduct root cause analysis and implement preventive solutions.

• Define policies, standards, and best practices for M365 usage.
• Maintain technical documentation, runbooks, and procedures.

• Bachelor’s degree in IT/IS or equivalent practical experience; 10+ years in IT Systems Engineering.
• 10+ years of experience with Microsoft 365 administration and engineering.
• Microsoft Certification is desired.
• ITIL awareness highly preferred.
• Core Microsoft 365 Platform expertise:
• Architecture, licensing, tenant management.
• Exchange Online (mail flow, connectors, hybrid setup, security).
• SharePoint Online (sites, permissions, governance).
• Microsoft Teams (voice, meetings, policies, integrations).
• One Drive (sync, sharing controls, retention).
• Identity & Access Management (Entra , hybrid identity, Conditional Access, MFA, RBAC).
• Security & Compliance (Microsoft Defender for Office 365, Microsoft Purview, DLP, Insider Risk, eDiscovery, Data Protection).
• Modern authentication, certificate‑based access, Azure AD Connect, federation, Zero Trust.
• Governance strategies, external sharing, B2B collaboration.
• DNS (MX, SPF, DKIM, DMARC), Certificates & TLS, firewalls, proxies, endpoints.

$110,000 – $125,000

Our Company adheres to the equal employment opportunity guidelines set forth by federal, state, and local laws. The information requested on this form is sought in good faith and will not be used to discriminate against the applicant based on race, religion or creed, color, national origin, ancestry, physical disability, mental disability, medical condition, genetic characteristics, marital status, sex or gender (which includes pregnancy, childbirth, or related circumstances), gender identity, gender expression, age, citizenship, sexual orientation, family care or medical leave status, military and veteran status, political affiliation, or any other characteristic protected by federal, state and local laws.