Remote Linux Engineer Jobs in Simi Valley, CA (NOW HIRING)

We are looking for an MSP Senior Systems Engineer is responsible for designing, implementing, and supporting client infrastructure across onpremises and cloud environments for multiple managed services customers. They serve as a tier3 escalation point, lead projects such as cloud migrations and network refreshes, and ensure client environments are secure, stable, and welldocumented.

• Design, deploy, and support servers, storage, and virtualization platforms (VMware/HyperV) for multiple clients in an MSP setting.
• Implement and support Microsoft technologies including Windows Server, Active Directory, Group Policy, Microsoft 365/Office 365, and Exchange (onprem and cloud).
• Plan and execute migrations (e.g., Microsoft 365, Azure, onprem to cloud, server upgrades, domain consolidations) with minimal downtime.
• Manage and troubleshoot client networks including WAN/LAN, VPNs, switching, wireless, and firewalls (e.g., Cisco, Meraki, Palo Alto, SonicWall).
• Act as a tier3 escalation point for complex systems, network, and cloud issues, resolving incidents that exceed service desk capabilities.
• Monitor and maintain client environments using RMM and other MSP toolsets, ensuring patching, backups, and security baselines are in place.
• Implement and maintain security controls such as MFA, conditional access, endpoint protection, and email security (e.g., Mimecast, Proofpoint).
• Document client environments, architectures, standards, and procedures; maintain accurate records in PSA and knowledge base systems (e.g., ConnectWise).
• Lead or contribute to infrastructure and cloud projects, including network refreshes, server replacements, and modernization initiatives.
• Provide highquality client communication, act as a trusted technical advisor, and help manage expectations around scope, timelines, and risk.
• Mentor junior engineers/technicians and contribute to improving internal processes, standards, and automation.

• 5+ years of experience designing, implementing, and supporting Windowsbased infrastructure in multisite or multitenant environments.
• Prior experience working for a Managed Service Provider (MSP) or similar multiclient service environment. MSP experience is often explicitly required.
• Strong expertise with:
  - Windows Server, Active Directory, Group Policy, DNS, DHCP, file/print services.
  - Virtualization platforms such as VMware and/or HyperV.
  - Microsoft 365 (Exchange Online, SharePoint, Teams) and related migration projects.
• Solid networking knowledge: TCP/IP, VLANs, VPNs, routing/switching concepts, and firewall configuration/troubleshooting.
• Handson experience with Azure and/or AWS for IaaS/PaaS workloads, including connectivity and identity integration.
• Proven experience troubleshooting complex performance, connectivity, and authentication issues across systems and networks.
• Strong documentation skills and familiarity with PSA/RMM tools commonly used by MSPs (e.g., ConnectWise, similar platforms).

• Relevant certifications such as Microsoft (Azure/Windows Server/M365), VMware, Cisco, or similar.
• Experience with SAN/NAS storage, converged/hyperconverged infrastructure, and backup/DR solutions.
• Scripting/automation skills (e.g., PowerShell) to streamline recurring tasks and standardize deployments.
• Experience with zerotrust/securityfocused designs, including conditional access, identity protection, and advanced email/security tools.