Zachary Piper Solutions is seeking a Windows/Linux System Administrator to support a company supporting federal contact center and enterprise communications operations. This position is onsite in the Washington, DC metro area, and is an opportunity supporting mission-critical systems. The Windows/Linux System Administrator will support enterprise telephony and infrastructure environments across a secure federal program. This individual will be responsible for maintaining Windows, Linux, VMware, and Avaya systems while ensuring system reliability, security, and performance. Responsibilities for the Windows/Linux System Administrator include: • Administer and support Avaya telephony systems, call recording platforms, and workforce management tools. • Install, configure, and maintain Windows and Linux server environments. • Manage VMware ESXi and vCenter infrastructure, including upgrades and troubleshooting. • Troubleshoot issues involving Active Directory, DNS, DHCP, LDAP, networking, and system integrations. • Apply operating system patches, perform preventive maintenance, and monitor system health. • Partner with security teams to remediate vulnerabilities and ensure compliance requirements are met. • Participate in a rotational on-call schedule supporting 24x7x365 operations. Qualifications for the Windows/Linux System Administrator include: • Active Secret Security Clearance required. • 7+ years of experience supporting telephony systems in a Systems Administrator or Systems Engineer role. • Hands-on experience with Windows Server and Linux administration. • Experience supporting Avaya platforms, call recording solutions, and workforce management applications. • Strong VMware experience with ESXi, vCenter, and virtualization technologies. • Knowledge of Active Directory, Group Policy, IPv4/IPv6 networking, certificate management, and security remediation. Compensation for the Windows/Linux System Administrator includes: • Salary Range: Competitive based on experience • Full Benefits Package: PTO, Paid Holidays, Medical, Dental, Vision, 401K, Tuition Reimbursement, Paid Maternity Leave, Military Reserve Pay Offset #LI-AK #LI-ONSITE #LI-AK1 #LI-ONSITE Windows System Administrator, Linux System Administrator, Windows/Linux System Administrator, Systems Administrator, Senior Systems Administrator, Infrastructure Administrator, Infrastructure Engineer, Senior Infrastructure Engineer, Systems Engineer, Senior Systems Engineer, Enterprise Systems Administrator, Enterprise Systems Engineer, Telecommunications Engineer, Telephony Engineer, Senior Telephony Engineer, Voice Engineer, VoIP Engineer, Unified Communications Engineer, UC Engineer, Avaya Engineer, Avaya Systems Engineer, Avaya Administrator, Telecom Systems Administrator, Contact Center Engineer, Contact Center Systems Engineer, Call Center Infrastructure Engineer, Workforce Management Engineer, Workforce Optimization Engineer, Telecommunications Specialist, Network and Systems Administrator, Network Systems Engineer, Windows Administrator, Linux Administrator, Server Administrator, Server Engineer, Platform Engineer, Infrastructure Support Engineer, IT Systems Engineer, IT Infrastructure Engineer, VMware Engineer, VMware Administrator, Virtualization Engineer, Virtualization Administrator, Active Directory Administrator, Microsoft Systems Administrator, Enterprise Infrastructure Engineer, Technical Operations Engineer, Operations Engineer, Data Center Engineer, Data Center Systems Administrator, Information Systems Engineer, IT Operations Engineer, Telecom Infrastructure Engineer, Unified Communications Administrator, Voice Systems Engineer, Voice Systems Administrator, Telecom Support Engineer, Federal Systems Administrator, Federal Systems Engineer, Cleared Systems Administrator, Cleared Systems Engineer, Secret Cleared Systems Administrator, Secret Cleared Systems Engineer, Government Systems Engineer, Government Infrastructure Engineer, Mission Critical Systems Engineer, Network Operations Engineer, Enterprise Support Engineer, Infrastructure Operations Engineer, Windows Server Administrator, Linux Server Administrator, Senior Windows/Linux Administrator, Senior Infrastructure Administrator, Enterprise Telephony Engineer, Contact Center Infrastructure Engineer, Telecommunications Systems Engineer.