Senior System Administrator L3; MSP

We are a well-established Managed Services Provider hiring a Senior Systems Administrator L3 to handle advanced escalations, complex troubleshooting, and project support across Microsoft, server, network, firewall, cloud, and security environments.

This is a strong opportunity for an experienced MSP engineer who wants to stay hands-on, work across multiple client environments, and serve as the go‑to technical resource for issues that require deeper troubleshooting. You will support Tier 1 and Tier 2 technicians, resolve high‑priority client issues, contribute to projects, and help improve technical standards across the team.

The role is best suited for someone who has already worked in a fast‑paced MSP environment and is comfortable balancing escalations, client communication, documentation, and hands‑on technical problem solving.

• Resolve Tier 3 escalations across Microsoft 365, Windows Server, Active Directory, Azure, networking, firewalls, backups, and security tools
• Troubleshoot outages, performance issues, failed services, connectivity problems, and high‑priority client incidents
• Administer Windows Server, Active Directory, Group Policy, Exchange, Microsoft 365, Entra , and Azure environments
• Support server deployments, Microsoft 365 changes, user migrations, network upgrades, and client rollouts
• Troubleshoot VLANs, VPNs, routing, switching, wireless, DNS, DHCP, and firewall connectivity
• Support Sonic Wall, Fortinet, Cisco, or similar firewall platforms
• Review escalated tickets and help junior technicians improve troubleshooting, documentation, and resolution quality
• Validate completed project work and resolve post‑deployment issues
• Identify recurring technical problems and recommend long‑term fixes
• Maintain accurate documentation, ticket notes, client environment details, and resolution steps

• Recent experience working for a Managed Services Provider
• Strong experience supporting multiple client environments
• Advanced troubleshooting ability across Microsoft 365, Windows Server, Active Directory, networking, and firewalls
• Hands‑on experience with Group Policy, Exchange, Entra , Azure, DNS, DHCP, and hybrid Microsoft environments
• Strong networking knowledge across VLANs, VPNs, routing, switching, wireless, and firewall troubleshooting
• Experience with Sonic Wall, Fortinet, Cisco, or comparable firewall platforms
• Experience resolving escalations, outages, and high‑priority client issues
• Ability to mentor Tier 1 and Tier 2 technicians without needing to move into management
• Strong client communication, documentation, ownership, and follow‑through

• $115,000 to $125,000 salary
• Senior L3 role with real technical ownership
• Hands‑on work across systems, cloud, networking, security, and projects
• Health, Dental, and Vision Insurance with multiple plan options
• 401(k) with 4% company match
• PTO, paid sick days, and paid holidays
• Career advancement opportunities
• Supportive technical environment focused on growth, feedback, and long‑term development