Windows / Linux System Administrator

Maximus TCS (Technology and Consulting Services) Internal Job Profile Code: TCS249, T4, Band 7

Job-Specific Essential Duties and Responsibilities:

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

• 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.

• Other tasks as assigned.

Job-Specific Minimum 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 experience supporting telephony systems in a systems administrator or engineer role.

o Experience with Windows / Linux Server environments, including installation, patching, and troubleshooting.

o Experience with telephony platforms, including Avaya and call recording/workforce management applications.

o Experience with VMware environments, including ESXi and vCenter, for installation, upgrades, troubleshooting, and ESXi certificate management.

o Networking experience includes IPv4 / IPv6, ports/protocols, and monitoring.

o Familiarity with remediation and validation of security vulnerabilities in a Windows / Linux Server environment.

o Proficiency with managing and monitoring infrastructure, including telephony peripherals and server systems.

o Knowledge of client/server certificate management.

o Experience with Active Directory and Group Policy Administration.

• Candidates must reside within a commutable distance for daily onsite work and on-call requirements.

• This contract supports systems that require 24x7x365 uptime.

Candidates must be willing and able to meet recall requirements, including participation in a rotational on-call schedule.

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 e...