Windows / Linux Systems Administrator — Telephony Infrastructure
Location: Annapolis Junction, MD
Schedule: Full-time | Onsite
Clearance: Active Secret clearance required
Salary Range: $90,000–$100,000 annually
The Opportunity
We are hiring an experienced Windows / Linux Systems Administrator to support internal enterprise telephony systems for a Homeland Security mission.
This role combines systems administration, telephony, virtualization, networking, and security. You’ll provide hands-on technical expertise across Windows and Linux servers while supporting the infrastructure behind critical voice and call-management services.
This position is onsite in Annapolis Junction, Maryland and supports systems requiring 24x7x365 availability.
What You’ll Do
- Manage and support enterprise telephony environments, including hardware, software, peripherals, and applications such as WFO/WFM, CMS, and call recording platforms.
- Install, configure, operate, monitor, and maintain enterprise infrastructure, including IIS web servers, application servers, telecom hardware, Dell PowerEdge servers, and Avaya J Series phones.
- Troubleshoot and resolve issues involving telephony platforms, Windows and Linux servers, network connectivity, and system integrations.
- Support integrations with Active Directory, DNS, DHCP, and LDAP.
- Work across technical teams to implement telephony solutions supporting high availability, call quality, security, and performance requirements.
- Apply scheduled and emergency patches to Windows and Linux Server environments to maintain security and compliance.
- Plan, test, and execute system upgrades and migrations.
- Conduct system health checks and preventive maintenance.
- Coordinate with security teams to address audit findings and implement appropriate remediation.
- Perform other assigned responsibilities as needed.
What You’ll Bring
- An active Secret security clearance.
- U.S. citizenship. Due to contract requirements, candidates with dual citizenship cannot be considered.
- 7+ years of relevant experience in systems administration or systems engineering.
- Experience administering Windows and Linux Server environments, including installation, patching, troubleshooting, and ongoing support.
- Experience with telephony platforms, including Avaya and call recording/workforce management applications.
- Experience with VMware environments, including ESXi and vCenter, covering installation, upgrades, troubleshooting, and ESXi certificate management.
- Networking experience involving IPv4/IPv6, ports and protocols, and monitoring.
- Familiarity with the remediation and validation of security vulnerabilities in Windows and Linux Server environments.
- Proficiency managing and monitoring infrastructure, including telephony peripherals and server systems.
- Knowledge of client/server certificate management.
- Experience with Active Directory and Group Policy Administration.
- Ability to reside within a commutable distance of Annapolis Junction, MD for daily onsite work and on-call responsibilities.
- Willingness and ability to meet recall requirements for systems requiring 24x7x365 uptime, including participation in a rotational on-call schedule.
Preferred Qualifications
- Prior DHS suitability.
- Scripting experience with PowerShell and/or Shell scripting.
- Experience with VMware virtualization technologies.
- Experience with Microsoft SQL Server and PostgreSQL databases.
- Demonstrated experience administering Active Directory and Group Policy.
- Experience with security vulnerability remediation and validation.
Compensation
The annual salary range for this position is $90,000–$100,000.