Windows/Linux System Administrator

About the role

Manage and support enterprise telephony systems across programs, including hardware, software, peripherals, and call applications such as WFO/WFM, CMS, and call recording platforms.

Responsibilities

• Install, configure, operate, monitor, and maintain enterprise infrastructure, including web servers (e.g., IIS), application servers, and telecom hardware (e.g., Dell PowerEdge servers, Anaya J Series phones).
• Install, configure, troubleshoot, and resolve issues related to telephony systems, Windows / Linux servers, network connectivity, and system integrations with Active Directory, DNS, DHCP, and LDAP.
• Collaborate with cross-functional teams to implement telephony solutions that ensure high availability, call quality, and compliance with security and performance standards.
• Apply regular and emergency patches to Windows / Linux Server environments to maintain security and compliance.
• Perform system upgrades and migrations, including planning, testing, and execution.
• Conduct regular system health checks and preventive maintenance.
• Coordinate with security teams to address audit findings and implement appropriate remediations.

Requirements

• Active Secret security clearance.
• Due to contract requirements, only US Citizens can be considered; candidates with dual citizenship cannot be considered.
• 7+ years of relevant experience in systems administrator or systems engineering.
• Experience with Windows / Linux Server environments, including installation, patching, and troubleshooting.
• Experience with telephony platforms, including Avaya and call recording/workforce management applications.
• Experience with VMware environments, including ESXi and vCenter, for installation, upgrades, troubleshooting, and ESXi certificate management.
• Networking experience includes IPv4 / IPv6, ports/protocols, and monitoring.
• Familiarity with remediation and validation of security vulnerabilities in a Windows / Linux Server environment.
• Proficiency with managing and monitoring infrastructure, including telephony peripherals and server systems.
• Knowledge of client/server certificate management.
• Experience with Active Directory and Group Policy Administration.
• Reside within a commutable distance for daily onsite work and on-call requirements.
• Willing and able to meet recall requirements, including participation in a rotational on-call schedule to support 24x7x365 uptime.

Preferred/Desirable Skills

• Prior DHS suitability.
• Scripting experience (PowerShell, Shell scripting).
• Experience with virtualization technologies (VMWare).
• Experience with Microsoft SQL Server and PostgreSQL databases.
• Demonstrated experience with Active Directory and Group Policy administration.
• Experience with security vulnerability remediation and validation.