Systems Administrator (M365 Administrator)

Endava•Colorado, CO

3d•Hybrid

About The Position

Seeking a highly skilled Tier 3 Microsoft 365 Administrator to provide advanced technical support, administration, and engineering for our Microsoft 365 environment. This role serves as the escalation point for complex issues, leads platform optimization efforts, and partners closely with security, identity, and infrastructure teams to ensure a secure, scalable, and reliable M365 ecosystem. Must be local to Brentwood, TN or Denver, CO May require participation in on-call rotation for critical incidents Microsoft 365 Administration & Engineering Administer and optimize Microsoft 365 services, with deep hands-on ownership of: SharePoint Admin Center (Online sites, permissions, governance, storage, sharing) Exchange Admin Center (Online mailboxes, transport rules, retention, hybrid configurations) Teams Admin Center (Policies, voice, meetings, apps, and integrations) Design, implement, and maintain M365 configurations aligned with organizational standards and best practices Manage tenant-wide settings, service health, licensing, and capacity planning Tier 3 Support & Escalation Act as the highest-level escalation point for complex M365 incidents and service degradation Perform root cause analysis (RCA) and implement long-term corrective actions Engage Microsoft Premier/Unified Support as needed and manage cases to resolution Security, Compliance & Governance Partner with security teams to implement and maintain: Conditional Access policies Data Loss Prevention (DLP) Retention and eDiscovery policies Ensure compliance with organizational and regulatory requirements Support audits and security reviews related to M365 services Automation & Optimization Develop and maintain automation using PowerShell , Microsoft Graph, and M365 APIs Improve operational efficiency through scripting, standardization, and self-service tooling Evaluate and deploy new M365 features and capabilities Collaboration & Leadership Mentor Tier 1 and Tier 2 support staff Create and maintain technical documentation, runbooks, and standards Provide architectural input for M365-related projects and migrations

Requirements

5+ years of experience administering Microsoft 365 in an enterprise environment
Expert-level experience with: SharePoint Online and SharePoint Admin Center Exchange Online and Exchange Admin Center Microsoft Teams and Teams Admin Center
Strong PowerShell scripting skills for M365 administration
Solid understanding of Azure AD / Entra ID (identity, authentication, and access management)
Experience troubleshooting hybrid environments (on-prem AD, Exchange hybrid)
Strong analytical, documentation, and communication skills

Nice To Haves

Microsoft certifications (e.g., MS-102 , Exchange , Teams , or Security certifications)
Experience with Microsoft Purview, Defender for Office 365, and Intune
Familiarity with large-scale migrations to M365
Experience in regulated or highly secure environments

Responsibilities

Administer and optimize Microsoft 365 services
Design, implement, and maintain M365 configurations aligned with organizational standards and best practices
Manage tenant-wide settings, service health, licensing, and capacity planning
Act as the highest-level escalation point for complex M365 incidents and service degradation
Perform root cause analysis (RCA) and implement long-term corrective actions
Engage Microsoft Premier/Unified Support as needed and manage cases to resolution
Partner with security teams to implement and maintain security policies
Ensure compliance with organizational and regulatory requirements
Support audits and security reviews related to M365 services
Develop and maintain automation using PowerShell , Microsoft Graph, and M365 APIs
Improve operational efficiency through scripting, standardization, and self-service tooling
Evaluate and deploy new M365 features and capabilities
Mentor Tier 1 and Tier 2 support staff
Create and maintain technical documentation, runbooks, and standards
Provide architectural input for M365-related projects and migrations

Benefits

Competitive salary package, share plan, company performance bonuses, value-based recognition awards, referral bonus
Career coaching, global career opportunities, non-linear career paths, internal development programmes for management and technical leadership
Complex projects, rotations, internal tech communities, training, certifications, coaching, online learning platforms subscriptions, pass-it-on sessions, workshops, conferences
Hybrid work and flexible working hours, employee assistance programme
Global internal wellbeing programme, access to wellbeing apps
Global internal tech communities, hobby clubs and interest groups, inclusion and diversity programmes, events and celebrations
Robust healthcare and benefits including Medical, Dental, vision, Disability coverage, and various other benefit options
Flexible Spending Accounts (Medical, Transit, and Dependent Care)
Employer Paid Life Insurance and AD&D Coverages
Health Savings account paired with our low-cost High Deductible Medical Plan
401(k) Safe Harbor Retirement plan with employer match with immediately vest