Senior IT & Network Systems Administrator (Part-Time)

Four Sea Group, Inc. • Greenwood Village, CO

28d • $95,000 - $130,000 • Hybrid

About The Position

Four Sea Group is seeking a part-time Senior IT & Network Systems Administrator to manage and support our Microsoft 365, Azure, AWS, endpoint, network, backup, collaboration, and physical office technology environments. The ideal candidate has 10+ year of progressive IT, systems administration, network administration, cloud administration, and security operations experience. This is a senior hands-on role for someone who can operate independently, improve security posture, troubleshoot complex issues, support users, and maintain reliable IT operations across a small government contractor environment.

Requirements

• 10+ years of relevant experience in IT systems administration, network administration, cloud administration, endpoint management, security operations, or related infrastructure support roles.
• Strong hands-on experience with Microsoft 365, Azure, Entra ID, Intune, Defender, Purview, Sentinel, Conditional Access, and Windows endpoint management.
• Experience supporting AWS, enterprise networking, backup operations, collaboration tools, and physical office technology.
• Ability to troubleshoot complex issues across identity, endpoint, cloud, network, security, and user support areas.
• Strong documentation skills and the ability to create reliable, repeatable IT processes.
• Ability to work in the Denver, Colorado area, within a hybrid environment, and provide on-site support when needed.

Nice To Haves

• Experience supporting a government contractor, defense contractor, or regulated environment.
• Familiarity with CMMC, NIST SP 800-171, CUI handling, GCC High, or Microsoft compliance tooling.
• Experience with Juniper / JunOS, Commvault, Jamf, macOS, Zoom Rooms, Logitech conference systems, and SharePoint information architecture.
• Microsoft, CompTIA, AWS, Cisco, Juniper, or security-related certifications.
• Experience with PowerShell, JavaScript, Python, and infrastructure-as-code concepts.

Responsibilities

• Administer and secure Microsoft 365, Azure, Entra ID, Intune, Purview, Defender, Sentinel, Conditional Access, Autopilot, and Windows Update configurations.
• Manage endpoint provisioning, Windows 11 hardening, vulnerability remediation, CIS benchmark remediation, device compliance, application deployment, and user support.
• Support AWS services, including IAM / SSO, S3, CloudFront, and CodeDeploy.
• Administer and troubleshoot Juniper network equipment, JunOS configurations, LAN/WAN connectivity, Wi-Fi, routing, switching, and related network infrastructure.
• Manage SharePoint permissions, data organization, access controls, and collaboration structure.
• Support Commvault backups, Zoom for Business, Zoom Rooms, Logitech conferencing equipment, printers, office IT equipment, and other physical technology assets.
• Support macOS device management, Jamf, Rippling authentication workflows, and general employee technical support.
• Create and maintain documentation, standard operating procedures, and repeatable technical processes.
• Support CMMC, NIST SP 800-171, CUI handling, audit evidence collection, and secure separation between multiple environments.
• Use scripting and automation where appropriate, including PowerShell, JavaScript, Python, and infrastructure-as-code principles.

Benefits

• FSG is 100% ESOP-owned, which means our employees share directly in the company’s growth.
• Competitive compensation
• A strong employer-funded retirement plan
• Generous PTO and flexible time-off options
• Comprehensive health, dental, vision, life, short-term disability, and long-term disability benefits
• A generous medical stipend that gives employees more choice and flexibility.

What This Job Offers

• Job Type: Part-time
• Career Level: Senior
• Education Level: No Education Listed