Tier II IT Help Desk Specialist - Mission-Critical Support

A & T SYSTEMS INC; Maryland; On-site; USD 60,000 - 90,000; Full time

Job summary

A & T SYSTEMS INC is seeking an IT Help Desk Support Specialist – Tier II at Aberdeen Proving Grounds (APG), MD. The role provides intermediate-level technical support for enterprise IT systems under the IMCS IV contract, resolving escalated issues from Tier I while ensuring secure, compliant operations.

Responsibilities include troubleshooting hardware, software, and network problems; maintaining desktops, printers, mobile devices, and enterprise applications; managing user accounts; and

Qualifications

• Experience troubleshooting Windows operating systems and standard enterprise software applications.
• Working knowledge of networking fundamentals including TCP/IP, DNS, DHCP, and Active Directory.
• Experience supporting enterprise-level IT environments.
• DoD 8570/8140 compliant certification (e.g., Security+, A+, Network+, or equivalent).
• Ability to obtain and maintain required security clearance.
• Meet DoD Cyber Workforce Framework (DCWF) Code 411 requirements

Responsibilities

• Troubleshoot and resolve hardware, software, operating system, and network connectivity issues escalated from Tier I.
• Install, configure, and maintain desktops, laptops, printers, mobile devices, and peripherals.
• Provide support for enterprise applications, email systems, collaboration platforms, and authentication services.
• Perform account management tasks including password resets, group membership updates, and access troubleshooting.
• Escalate unresolved or complex issues to support or appropriate technical teams.
• Assist with system imaging, deployments, upgrades, and technical refresh initiatives.

Skills

Windows troubleshooting

Networking fundamentals

Security clearance

DCWF Code 411

DoD 8570/8140 certification

Enterprise IT support

Tools

ITSM ticketing system

Remote support tools

Virtualization/cloud environments

Job description

A & T SYSTEMS INC is seeking an IT Help Desk Support Specialist – Tier II at Aberdeen Proving Grounds (APG), MD. The role provides intermediate-level technical support for enterprise IT systems under the IMCS IV contract, resolving escalated issues from Tier I while ensuring secure, compliant operations.

Responsibilities include troubleshooting hardware, software, and network problems; maintaining desktops, printers, mobile devices, and enterprise applications; managing user accounts; and