Senior System Administrator (MSP / Partial WFH)

Senior System Administrator (MSP / Partial WFH)

Location: San Dimas, CA

Work Model: Partial FH

Base Salary: $115,000 to $130,000

MSP Experience: Required

Why This Role Is Worth a Look

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.

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.

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.

What You Will Work On

• Serve as a senior technical resource for escalated systems, cloud, network, endpoint, and security issues

• Administer Windows Server, Active Directory, Group Policy, DNS, DHCP, file services, and core client infrastructure

• Support Microsoft 365, Exchange Online, SharePoint, Teams, Entra ID, Azure, Intune, and endpoint management environments

• Troubleshoot and improve firewalls, switches, VPNs, wireless, VLANs, routing, and general network connectivity

• Lead or assist with infrastructure projects including migrations, deployments, upgrades, onboarding, cloud improvements, and security initiatives

• Support endpoint security, backup, disaster recovery, patching, monitoring, and compliance related improvements

• Work with RMM, PSA, documentation, and automation tools to maintain strong service delivery standards

• Partner with service desk, project, and leadership teams to improve client environments and reduce recurring issues

• Communicate clearly with clients, document technical work accurately, and maintain strong ownership through resolution

What We Are Looking For

• 5+ years of IT support or systems administration experience

• Recent MSP experience supporting multiple client environments is required

• Strong Windows Server, Active Directory, Microsoft 365, Entra ID, Azure, and Intune experience

• Experience with virtualization, backups, endpoint security, patching, and disaster recovery tools

• Solid networking knowledge across DNS, DHCP, VLANs, VPNs, firewalls, switching, wireless, and routing

• Ability to troubleshoot advanced issues across systems, cloud, networking, endpoints, and security platforms

• Experience contributing to infrastructure projects, migrations, deployments, or client environment improvements

• Strong documentation, communication, ticketing, prioritization, and client service skills

• Ability to work independently while collaborating with technical teams in a fast moving MSP environment

Experience That Helps

• Microsoft certifications such as AZ 104, MS 102, MD 102, SC 300, or related credentials

• Network+, Security+, CCNA, or similar technical certifications

• Experience with ConnectWise, Autotask, Ninja, Datto, Atera, IT Glue, Hudu, or similar MSP tools

• Exposure to PowerShell, automation, AI enabled service delivery, or process improvement

• Experience mentoring junior technicians or acting as a technical escalation lead

Compensation and Benefits

• $115,000 to $130,000 base salary

• Health insurance effective on day one

• Employer sponsored life insurance

• Vision, Dental, Critical Care, Accident, and Disability Insurance options

• Medical and Dependent Care FSA

• Employee Assistance Program, discounts, and additional perks

• 401(k) with company match

• Paid holidays and PTO

• Company laptop

• Cellphone reimbursement

• Technology certification reimbursement program

• Salary increases for each certification passed

• Strong technical growth across Microsoft cloud, Intune, Azure, security, networking, automation, and infrastructure projects