Hiring: Senior Systems Administrator Company: MIRATECH Location: Tulsa, OK Job Posted Time: 2026-09-10 11:00:25 Target Skills & Keywords : Ansible, Azure, Bash, DNS, PowerShell, Python, Root Cause Analysis, SaaS, TCP/IP, Terraform, VPN, Windows Server About the job Experience: •7-10 years in IT support or systems administration, including demonstrable time at a Level 3 / senior escalation level supporting business-critical infrastructure. •10 years in IT support or systems administration, including demonstrable time at a Level 3 / senior escalation level supporting business-critical infrastructure. Required Skills: •Serve as the Level 3 escalation point for the US Help Desk team, taking ownership of complex incidents that cannot be resolved at Level 1 or Level 2. •Administer and maintain core server infrastructure including Windows Server, Active Directory, DNS, DHCP, file and print services, Group Policy and virtualization platforms (Hyper-V). •Design, configure, monitor and troubleshoot enterprise network infrastructure including switches, routers, firewalls, VPNs, and Wi-Fi across US sites. • Manage Microsoft 365, Azure / Entra ID, Intune and other cloud and SaaS platforms at an administrator level, including identity, access, MFA and conditional access policies. •Support and harden endpoint security tooling (EDR / AV, MFA, patching and vulnerability remediation) and partner with security stakeholders on hardening initiatives. •Lead root cause analysis for major incidents, document findings and drive permanent fixes through to completion. •Plan and execute infrastructure changes, upgrades and migrations during scheduled maintenance windows, including out-of-hours work where needed. •Participate in a shared on-call rotation for critical incidents impacting US offices and escalations from global teams. •Partner with global IT teams on cross-region projects, standards and architecture decisions, and act as a senior point of escalation for international IT colleagues. Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!