Senior Systems Administrator — Tier II Ops Lead (Onsite)

AMERICAN SYSTEMS; Chantilly (VA); On-site; USD 130,000 - 150,000; Full time

Job summary

AMERICAN SYSTEMS is seeking a Senior Systems Administrator to provide Tier II operational support in a first-shift, on-site role in Chantilly, VA, with eventual relocation to Arlington. You will maintain complex enterprise IT environments, ensure security, uptime, and performance, and collaborate across IT, security, and engineering teams.

The position requires active TS clearance with SCI eligibility, DoD 8140 IAT Level II, and hands-on Windows, VMware, and Cisco experience.

Qualifications

• Active Top Secret clearance with SCI eligibility.
• Bachelor’s degree + 5+ years of systems support or administration experience.
• Associate’s degree + 7+ years of relevant experience.
• High school diploma + 11+ years of relevant experience.
• Current DoD 8140 IAT Level II certification, such as Security+ CE.
• Ability to obtain a DoD 8140 computing-environment certification within 6 months of hire, such as MCSA, VCP, or equivalent.
• Experience supporting Microsoft Windows environments, including Windows Server 2008–2022, Windows 10/11, Exchange, Active Directory, DNS, Group Policy, PKI, workstation/server hardware, backup, antivirus, DHCP, and TCP/IP.
• Working knowledge of VMware and Cisco systems, including vSphere or Horizon View, Cisco networking devices, and TACLANE encryption devices.

Responsibilities

• Provide Tier II systems administration and operational support for a secure enterprise environment.
• Monitor, troubleshoot, and resolve system availability, performance, security, and configuration issues.
• Administer and support VMware vCenter, Horizon View, and Site Recovery Manager; SolarWinds; Cisco Catalyst Center (DNAC); GEMOne.
• Maintain the health, performance, and availability of multi-user systems.
• Partner with network, cybersecurity, engineering, service desk, and customer teams to resolve operational issues.
• Analyze requirements and support the integration, configuration, and sustainment of supported platforms.
• Participate in ITIL service management, including incident, problem, and change management activities.
• Prepare, document, and execute approved change requests.
• Develop and maintain SOPs, knowledge articles, and technical documentation.
• Support project and engineering teams with testing, packaging, release preparation, and production integration.
• Apply applicable security requirements, hardening guidance, and operational best practices.
• Provide technical guidance to junior Systems Administrators and Systems Engineers.
• Participate in shift turnover and document incidents, actions taken, and outstanding risks.

Skills

Active Top Secret clearance

DoD 8140 IAT Level II

Windows environments experience

Education

Bachelor’s degree

Associate’s degree

High school diploma

Tools

VMware vCenter

Horizon View

Site Recovery Manager

SolarWinds

Cisco Catalyst Center (DNAC)

HP SANs

PKI / MS Certificate Services

Active Directory

DNS

DHCP

Windows Server

Job description

AMERICAN SYSTEMS is seeking a Senior Systems Administrator to provide Tier II operational support in a first-shift, on-site role in Chantilly, VA, with eventual relocation to Arlington. You will maintain complex enterprise IT environments, ensure security, uptime, and performance, and collaborate across IT, security, and engineering teams.

The position requires active TS clearance with SCI eligibility, DoD 8140 IAT Level II, and hands-on Windows, VMware, and Cisco experience.