Senior System Administrator (MSP / Partial WFH)
Job Description
Senior System Administrator (MSP / Partial WFH)
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Location: San Dimas, CA
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Work Model: Partial FH
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Base Salary: $115,000 to $130,000
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MSP Experience: Required
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Why This Role Is Worth a Look
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We are a growing Managed Services Provider hiring a Senior System Administrator to support advanced infrastructure, Microsoft cloud, security, and project work across multiple client environments.
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This is a strong fit for an experienced MSP engineer who wants more ownership, more technical variety, and a clear path to deeper systems, cloud, security, and infrastructure work.
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You will act as a senior escalation resource while also contributing to projects involving Microsoft 365, Azure, Entra ID, Intune, Windows Server, networking, endpoint security, automation, and client environment improvements.
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What You Will Work On
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• Serve as a senior technical resource for escalated systems, cloud, network, endpoint, and security issues
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• Administer Windows Server, Active Directory, Group Policy, DNS, DHCP, file services, and core client infrastructure
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• Support Microsoft 365, Exchange Online, SharePoint, Teams, Entra ID, Azure, Intune, and endpoint management environments
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• Troubleshoot and improve firewalls, switches, VPNs, wireless, VLANs, routing, and general network connectivity
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• Lead or assist with infrastructure projects including migrations, deployments, upgrades, onboarding, cloud improvements, and security initiatives
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• Support endpoint security, backup, disaster recovery, patching, monitoring, and compliance related improvements
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• Work with RMM, PSA, documentation, and automation tools to maintain strong service delivery standards
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• Partner with service desk, project, and leadership teams to improve client environments and reduce recurring issues
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• Communicate clearly with clients, document technical work accurately, and maintain strong ownership through resolution
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What We Are Looking For
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• 5+ years of IT support or systems administration experience
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• Recent MSP experience supporting multiple client environments is required
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• Strong Windows Server, Active Directory, Microsoft 365, Entra ID, Azure, and Intune experience
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• Experience with virtualization, backups, endpoint security, patching, and disaster recovery tools
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• Solid networking knowledge across DNS, DHCP, VLANs, VPNs, firewalls, switching, wireless, and routing
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• Ability to troubleshoot advanced issues across systems, cloud, networking, endpoints, and security platforms
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• Experience contributing to infrastructure projects, migrations, deployments, or client environment improvements
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• Strong documentation, communication, ticketing, prioritization, and client service skills
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• Ability to work independently while collaborating with technical teams in a fast moving MSP environment
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Experience That Helps
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• Microsoft certifications such as AZ 104, MS 102, MD 102, SC 300, or related credentials
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• Network+, Security+, CCNA, or similar technical certifications
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• Experience with ConnectWise, Autotask, Ninja, Datto, Atera, IT Glue, Hudu, or similar MSP tools
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• Exposure to PowerShell, automation, AI enabled service delivery, or process improvement
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• Experience mentoring junior technicians or acting as a technical escalation lead
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Compensation and Benefits
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• $115,000 to $130,000 base salary
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• Health insurance effective on day one
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• Employer sponsored life insurance
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• Vision, Dental, Critical Care, Accident, and Disability Insurance options
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• Medical and Dependent Care FSA
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• Employee Assistance Program, discounts, and additional perks
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• 401(k) with company match
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• Paid holidays and PTO
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• Company laptop
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• Cellphone reimbursement
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• Technology certification reimbursement program
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• Salary increases for each certification passed
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• Strong technical growth across Microsoft cloud, Intune, Azure, security, networking, automation, and infrastructure projects