System Administrator TS/SCI Clearance | Flexible 9/80 Hours

Arcfield; Greenwood Village (CO); Hybrid; USD 69,000 - 120,000; Full time

Job summary

Arcfield is seeking a System Administrator / Tier II to support IT services and manage infrastructure in a hybrid Colorado-based environment. The role balances end-user support with backend system administration, requiring proactive problem solving and strong communication.

Responsibilities include managing Active Directory, patching, and coordinating with vendors on IT initiatives, while ensuring security and availability in a fast-paced setting.

Qualifications

• 2–4 years' experience with BS/BA or 0–2 years with MS/MA or 8–10 years with HS.
• DoD 8570 - IAT Level II certification (e.g., Sec+, CISSP) is required.
• Active TS/SCI clearance with ability to obtain a Polygraph.
• Proficient in Windows OS and AD; virtualization and networking knowledge.
• Experience with Linux and scripting (PowerShell, Bash, Python).

Responsibilities

• Serve as IT support contact via phone, email, ticketing, or in person.
• Install, configure, and update end-user OS, apps, and security software.
• Diagnose hardware, software, and network issues on desktops and printers.
• Maintain hardware/software asset inventory.
• Provide onboarding IT setup for new hires.
• Educate users on password management, backups, and software use.
• Document tickets and resolutions for future troubleshooting.
• Manage Active Directory, group policies, and user accounts.
• Monitor system performance for high availability.
• Collaborate with internal teams and vendors on IT initiatives.
• Plan system upgrades, patches, and firmware updates.
• Escalate to senior staff when needed.
• Maintain customer-service mindset in problem-solving.
• Install, configure, and maintain IT infrastructure.
• Monitor security vulnerabilities and respond to incidents.

Skills

Windows OS

Active Directory

Networking TCP/IP

PowerShell

Bash

Python

Linux

Troubleshooting

Security best practices

Communication

Independence

Education

BS/BA or MS/MA or HS with extensive experience

Tools

VMware

Hyper-V

On-Premise Software Center Configuration Management

Exchange

Active Directory (tooling)

Job description

Arcfield is seeking a System Administrator / Tier II to support IT services and manage infrastructure in a hybrid Colorado-based environment. The role balances end-user support with backend system administration, requiring proactive problem solving and strong communication.

Responsibilities include managing Active Directory, patching, and coordinating with vendors on IT initiatives, while ensuring security and availability in a fast-paced setting.