> Markdown version of [/jobs/ext/576637-senior-system-administrator](https://www.wearedevelopers.com/jobs/ext/576637-senior-system-administrator). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior System Administrator - **Company:** Technijian, Inc. - **Location:** Irvine, CA, United States - **Experience:** Expert - **Salary:** $60,000.0 - $100,000.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Amazon Web Services, Microsoft Azure, Backup Devices, Dynamic Host Configuration Protocol, Disaster Recovery, Domain Name System (DNS), Microsoft Exchange Server, Monitoring of Systems, Internet Protocol, Virtual Private Networks (VPN), Log Analysis, Microsoft Office, Microsoft SQL Server, Windows Servers, Network Architecture, Network Diagrams, Routing, Network Service, Performance Tuning, Cloud Services, Microsoft SharePoint, TCP/IP, User Provisioning Software, Virtual Local Area Networks, Virtual Machines, Virtualization Technology, Network Routers, Firewalls (Computer Science), Information Technology, Gsuite, Network Server, Vmware - **Published:** June 20, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=80234c278b1b6ed5 ## About the Role Do you have experience in Windows support?, Do you have a Bachelor's degree?, We are seeking a Senior System Administrator to take ownership of critical infrastructure and managed services for our US-based clients. This is a senior, hands-on technical role for someone who is highly disciplined, detail-oriented, and committed to delivering accurate, high-quality results at a fast pace., You are someone who: * Is Detail-Oriented & Analytical You carefully analyze issues, validate assumptions, and ensure nothing is missed before implementing changes. * Is Self-Disciplined & Results-Driven You manage multiple tickets and projects simultaneously without sacrificing quality or documentation. * Makes Decisive, Quality-Focused Decisions, * 5+ years of hands-on experience as a System Administrator / Senior System Administrator / System Engineer in a managed services or enterprise environment. * Strong experience with: * Microsoft Windows Server (2012/2016/2019+) administration - 5+ years (Required) * VMware administration - 5+ years (Required) * Microsoft Exchange (on-prem/hybrid) - 5+ years (Required) * Microsoft SQL Server - 5+ years (Required) * IP networking (Routing, TCP/IP, VLANs, VPNs) - 5+ years (Required) * Solid understanding of Microsoft 365 / Office 365, including Exchange Online, SharePoint, Teams, and security/compliance features. * Experience with cloud platforms such as AWS and/or Azure, including migration or hybrid setups. * Strong troubleshooting skills across servers, networks, and applications with a methodical, root-cause-driven approach. * Experience with monitoring tools, log analysis, and performance tuning preferred. Behavioral & Leadership Requirements * Highly organized, structured, and accurate in all aspects of work, including documentation and communication. * Able to balance multiple simultaneous projects in a fast-paced, service-driven environment while maintaining high standards. * Comfortable making quick, well-judged decisions within a clearly defined span of control. * Strong sense of ownership and accountability for systems and outcomes. * Willing and able to coach and train others, providing clear expectations, feedback, and follow-up. * Willing to complete a behavior and skills assessment as part of the hiring process. Education & Certifications * Bachelor's degree in Computer Science, Information Technology, or a related field (Preferred). * Relevant certifications are a plus and strongly preferred, such as: * MCSE / MCSA / Microsoft 365 / Azure * VMware (VCP) * CCNA / CCNP / equivalent networking certifications - 5 years of networking experience (Required) ## Description You will be responsible for maintaining and improving Windows server environments, virtualized infrastructure, core applications, and network services, while also guiding junior team members when required., You can make quick technical decisions within established standards, policies, and procedures. * Is Structured & Process-Oriented You follow and enforce best practices, SOPs, and security controls, and help improve them where needed. * Leads Through Expertise You are comfortable coaching and training others, providing clear direction and close follow-up when delegating. As part of our interview process, candidates will complete a behavior and skills assessment to ensure strong alignment with the expectations and standards for this role., * Provide specialized technical support and managed services across Windows servers, virtualization, cloud services, and core applications for US-based clients. * Administer and maintain Windows Server environments (2012, 2016, 2019 and above), Active Directory, Group Policy, DNS, DHCP, file/print services, and related infrastructure. * Support and manage Microsoft 365 / Office 365 and G-Suite environments, including email, security, policies, and user provisioning. * Manage and troubleshoot VMware environments, including virtual machines, resource allocation, and performance optimization. * Administer Microsoft SQL Server and Exchange (on-prem and/or hybrid), including basic maintenance, backup, and troubleshooting. * Support and maintain network infrastructure, including switches, firewalls, and routers (e.g., Cisco Meraki, Sophos), working closely with the networking team where required. * Perform incident resolution, root-cause analysis, and problem management within defined SLAs and quality standards. * Plan and execute patching, upgrades, and migrations, including server upgrades, OS hardening, and cloud or on-prem transitions (AWS/Azure). * Implement and monitor backup, disaster recovery, and security controls, ensuring systems meet availability, integrity, and confidentiality requirements. * Create and maintain accurate documentation, including runbooks, SOPs, network diagrams, and configuration records. * When required, provide oversight, mentoring, and structured guidance to team members to ensure adherence to company policies, procedures, and timelines. * Collaborate with US stakeholders and internal teams, communicating clearly on technical status, risks, and action plans. ## Related Videos - [Why Your Best Mediors Never Become Seniors (And How to Fix It)](https://www.wearedevelopers.com/videos/2108-why-your-best-mediors-never-become-seniors-and-how-to-fix-it) - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Turning Container security up to 11 with Capabilities](https://www.wearedevelopers.com/videos/718-turning-container-security-up-to-11-with-capabilities) - [Generating code with Angular schematics](https://www.wearedevelopers.com/videos/129-generating-code-with-angular-schematics) ## Related Articles - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)