Mission Critical Partners, LLC · United States
About the Role
We are seeking a highly skilled and experienced Senior Systems Administrator to support our fully cloud-based IT environment serving approximately 200 users across a diverse portfolio of SaaS platforms. As a senior technical resource, you will be responsible for maintaining secure, reliable, and scalable systems while driving operational improvements and mentoring junior staff.
Responsibilities
Administer and optimize Microsoft 365 GCC, Azure/Entra ID, Exchange Online, Teams, SharePoint, and other enterprise SaaS platforms
Manage identity and access controls, including Conditional Access, MFA, privileged access, RBAC, and identity lifecycle management
Maintain and improve endpoint management, device compliance, and mobile device management using Microsoft Intune or equivalent platforms
Configure and maintain cloud-based collaboration, storage, and communication services
Support tenant administration, licensing, and policy management across Microsoft cloud environments
Monitor, investigate, and respond to alerts across Microsoft Defender and related security platforms
Assist in implementing and maintaining security controls aligned with NIST and organizational security policies
Support vulnerability management, endpoint protection, patch management, and security hardening initiatives
Participate in incident response, root cause analysis, remediation efforts, and post-incident reviews