JMA
Technology
SeniorSystemAdministrator–WindowsServer&ActiveDirectory
Neural analysis suggests this role is
optimal for Senior candidates.
“Senior System Administrator – Windows Server & Active Directory at JMA. Skills: Active Directory, Windows Server, Microsoft 365, VMware vSphere. Own Active Directory architecture. Own Active Directory health”
Industry & Context.
Troubleshooting; Root cause analysis
On-call rotation
What They're Looking For.
Must Have
6+ years system administration, Senior-level Active Directory administration, Senior-level Windows Server administration, Expert Group Policy knowledge, Expert DNS knowledge, Expert DHCP knowledge, Expert PKI knowledge, Expert Windows Server roles knowledge, Proven identity controls design, Proven access controls design, Proven least-privilege controls design, Strong Microsoft 365 administration, Strong Office 365 administration, Strong VMware vSphere administration, Strong ESXi administration, Strong vCenter administration, Experience leading projects, Experience leading migrations, Experience leading disaster recovery planning, Demonstrated ability to mentor, Demonstrated ability to set technical standards, Demonstrated ability to set best practices, Excellent troubleshooting skills, Excellent communication skills, Excellent stakeholder-management skills, Security-focused mindset
Nice to Have
Bachelor's degree in IT, Bachelor's degree in Computer Science, Equivalent experience to Bachelor's, Microsoft Certified: Windows Server Hybrid Administrator Associate, Microsoft Certified: Identity and Access Administrator Associate, Microsoft 365 Administrator Expert, VMware VCP-DCV certification, Azure Solutions Architect certification, Azure Administrator certification, Advanced PowerShell scripting, Advanced automation scripting, Microsoft Graph scripting, Infrastructure-as-code familiarity, Hybrid identity experience, Entra Connect experience, Intune experience, Endpoint management experience, Zero Trust experience, Security frameworks experience, Compliance frameworks experience, Solid networking fundamentals, VLANs knowledge, Firewalls knowledge, VPN knowledge, Load balancing knowledge
What You'll Do.
Own Active Directory architecture
Own Active Directory health
Own Active Directory roadmap
Define Group Policy strategy
Govern Group Policy standards
Lead Windows Server role design
Lead Windows Server role administration
Set patching standards
Set hardening standards
Own capacity planning
Establish identity governance practices
Establish access governance practices
Maintain domain controllers
Troubleshoot domain controllers
Troubleshoot FSMO roles
Troubleshoot replication
Maintain authentication
Troubleshoot authentication
Design backup strategy
Validate backup strategy
Design restore strategy
Validate restore strategy
Design disaster recovery strategy
Validate disaster recovery strategy
Own hybrid identity strategy
Manage identity synchronization
Define authentication standards
Enforce authentication standards
Establish security baselines
Maintain security baselines
Establish patching cadence
Maintain patching cadence
Establish hardening standards
Maintain hardening standards
Lead support for audits
Lead support for access reviews
Lead support for logging
Lead support for compliance
Drive detection of security incidents
Drive response to security incidents
Lead root-cause analysis
Provide senior-level administration
Govern tenant configuration
Govern administrative role assignments
Design Microsoft 365 security
Design Microsoft 365 compliance
Maintain Microsoft 365 security
Maintain Microsoft 365 compliance
Lead tenant migrations
Lead adoption of new features
Resolve mail flow issues
Resolve service issues
Own VMware administration
Lead VM provisioning standards
Lead capacity planning
Serve as highest escalation level
Mentor junior administrators
Provide technical leadership
Lead infrastructure projects
Define automation strategy
Build tooling using PowerShell
Build tooling using Microsoft Graph
Author architecture documentation
Maintain architecture documentation
Author configuration records
Maintain configuration records
Partner with security
Partner with networking
Partner with application teams
Contribute to infrastructure roadmap
Contribute to technology decisions
Participate in on-call rotation
Lead on-call rotation
How You'll Work.
Team & Collaboration
Cross-functional teams; Security teams; Networking teams; Application teams
Communication Scope
Stakeholder management
Process & Methodology
Project planning, Project implementation, Migration planning, Upgrade planning
Full Job Description
## Description JMA is restoring U.S. leadership in wireless technology at a critical time in the transition to 5G. It makes the world’s most advanced software-based 5G platform, designed, coded, and manufactured in Syracuse, NY at the only U.S.-owned 5G factory in the country. Across its global tech centers, JMA makes 5G possible for organizations with the most critical connectivity demands in the world. JMA’s technology is ushering in a new era of connectivity for leading mobile carriers, the most iconic stadiums, major universities, leading healthcare centers, the busiest transit centers, and the U.S. Military. 5G is more than another G on your phone — it is a generational opportunity to change the way the world operates. Join the industry’s fastest growing technology company to shape that future today. We are seeking an experienced Senior Systems Administrator to manage and maintain our core enterprise infrastructure. The Senior System Administrator is the organization’s technical lead for Windows Server and Active Directory infrastructure, with strong supporting ownership of Microsoft 365 (Office 365) and VMware virtualization. This is a senior individual-contributor role that combines deep hands-on administration with architecture, standards-setting, and mentorship. The Senior System Administrator designs and operates a secure, resilient, and well-governed environment — leading complex projects and migrations, defining operational best practices, and serving as the highest level of escalation for infrastructure and identity. The ideal candidate is a seasoned, security-minded engineer who can both go deep technically and raise the capability of the wider team. ## Position Responsibilities Active Directory & Windows Server (Primary Focus) Own the architecture, health, and roadmap of Active Directory — domains, forests, trusts, sites, OUs, and replication. Define and govern Group Policy strategy and standards for security, configuration, and standardizatio
Applying for this Senior System Administrator – Windows Server & Active Directory role?
Most applicants get filtered before a human reads their resume. See if yours makes the cut.
How to Apply on Lever
- Lever uses a streamlined one-page form — apply in under 5 minutes.
- LinkedIn import works well; review parsed data before submitting.
- The cover letter field is optional but visible to reviewers — use it to differentiate.
- Referral codes from employees can significantly boost visibility of your application.
ANONYMOUS · UNFILTERED
What do employees actually say about JMA?
Real rants from real employees. Read before you apply.