Systems Administrator III
Mission Critical Partners•Port Matilda, PA
•Remote
About The Position
Mission Critical Partners is seeking a Senior Systems Administrator to support a fully cloud-based IT environment serving approximately 200 users across a diverse portfolio of SaaS platforms. This role provides technical leadership and hands-on administration across Microsoft 365 GCC, Azure/Entra ID, and related cloud services, with a strong emphasis on security monitoring, identity management, endpoint management, automation, and compliance alignment (NIST). The ideal candidate is highly self-directed, capable of independently owning infrastructure and security operations, and comfortable operating in a fast-paced, compliance-driven environment. This individual will serve as a senior technical resource responsible for maintaining secure, reliable, and scalable systems while driving operational improvements and mentoring junior staff. The role requires a professional committed to success by embracing and living our core values of Persistence, Integrity, Trust, Accountability, and Prudence.
Requirements
- 5–8+ years of experience in systems administration, with a strong focus on cloud-first enterprise environments
- Strong experience administering Microsoft 365 and Azure/Entra ID environments
- Hands-on experience with Microsoft Defender (Endpoint, Identity, Office 365, or Cloud Apps)
- Solid understanding of identity and access management principles, security best practices, and Zero Trust concepts
- Experience with endpoint management platforms such as Microsoft Intune
- Familiarity with NIST or similar security and compliance frameworks
- Experience supporting enterprise SaaS applications and cloud-based infrastructure
- Strong troubleshooting, analytical, and root cause analysis skills
- Experience with system monitoring, patch management, and operational support processes
- Ability to work independently with minimal oversight while managing multiple priorities effectively
- Strong verbal and written communication skills with both technical and non-technical stakeholders
Nice To Haves
- Experience working within Microsoft GCC or GCC High environments
- PowerShell scripting and automation experience
- Experience supporting multiple SaaS platforms and cloud integrations
- Familiarity with Azure security, conditional access policies, and compliance management tools
- Experience with Microsoft Intune, Exchange Online administration, and endpoint security solutions
- Understanding of virtualization, networking fundamentals, DNS, DHCP, VPN, and cloud connectivity concepts
- Relevant certifications such as: Microsoft Certified: Azure Administrator Associate, Microsoft 365 Certified: Enterprise Administrator Expert, CompTIA Security+, Microsoft Security Certifications, ITIL Foundation
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
- Assist with audit readiness, compliance reporting, and evidence collection activities
- Ensure availability, performance, reliability, and scalability of cloud-based systems and services
- Troubleshoot and resolve complex technical issues, escalations, and service interruptions
- Administer system configurations, updates, patching, and platform maintenance activities
- Support onboarding/offboarding processes from a systems, licensing, and access management perspective
- Maintain backup, recovery, and business continuity procedures for cloud services and critical systems
- Monitor system health, performance metrics, and operational alerts to proactively address issues
- Develop and maintain PowerShell scripts and automation processes to improve operational efficiency and reduce manual effort
- Identify opportunities for process optimization, standardization, and infrastructure modernization
- Recommend and implement enhancements to systems architecture, security posture, and operational workflows
- Maintain and improve technical documentation, procedures, and configuration standards
- Provide technical guidance, mentorship, and knowledge sharing to junior IT staff
- Collaborate with leadership on strategic technology initiatives, system improvements, and long-term infrastructure planning
- Partner with internal stakeholders and vendors to support operational and security objectives
- Participate in cross-functional projects and enterprise technology deployments
Benefits
- Robust employer contribution to employee medical benefits
- Competitive dental and vision insurance
- 401(k) plan with company match
- Wellness allowance to support employee well-being
- Life and AD&D insurance
- Disability insurance (short-term and long-term)
- Flexible Spending Accounts (FSA) & Health Savings Accounts (HSA)
- Flexible Paid Time Off to support work-life balance
- Employee Assistance Program (EAP)
- Perks at Work program offering discounts on products and services
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
