Senior Systems Administrator — Onsite, Windows/Linux & Security

nLIGHT, Inc.; Longmont (CO); On-site; USD 80,000 - 120,000; Full time

Benefits offered by this job

4 weeks of paid time off per year

11 paid holidays

Employee Stock Purchase Plan

Tuition Assistance Program

Health, Vision and Dental paid by the

Paid Family Leave, Disability

401k with company match

Job summary

nLIGHT-DEFENSE Systems, Inc. in Longmont, CO is seeking a System Administrator with 5+ years of experience across Windows Server, AD, M365, and core networking. The role focuses on maintaining IT infrastructure, security posture, image lifecycles, and Tier 2/3 escalation.

DoD clearance is preferred and required information is provided for eligibility. The position is onsite in Longmont with competitive compensation and benefits.

Qualifications

• 5+ years system administration experience across Windows Server, AD, M365, and core networking.
• Hands-on experience with HyperV and/or VMware.
• Practical Linux administration experience including building, securing, and maintaining OS images across different distributions.
• Experience performing patch management and threat analysis (CVE evaluation, prioritization, and remediation planning).

Responsibilities

• Manage Windows and Linux servers; maintain HyperV/VMware environments.
• Build, maintain, and secure Windows and Linux images, understanding key Linux variances (distros, package managers, service frameworks, SELinux/AppArmor, kernel modules).
• Support LAN/WAN networking, VPN, VLANs, DNS/DHCP, and general connectivity.
• Participate in maintenance windows and oncall rotations.
• Lead OS patch cycles and vulnerability review, performing threat analysis using CVE feeds, vendor advisories, and exploit intelligence.
• Maintain alignment with CMMC, DFARS 252.2047012, NIST 800171, and internal security controls.
• Administer Active Directory, Azure AD, Group Policy, and Microsoft 365 services.

Skills

System Administration

Windows Server

Active Directory

M365

Networking

Education

Associate degree in IT or related field

Tools

HyperV

VMware

Linux

PowerShell

Ansible

Packer

Job description

nLIGHT-DEFENSE Systems, Inc. in Longmont, CO is seeking a System Administrator with 5+ years of experience across Windows Server, AD, M365, and core networking. The role focuses on maintaining IT infrastructure, security posture, image lifecycles, and Tier 2/3 escalation.

DoD clearance is preferred and required information is provided for eligibility. The position is onsite in Longmont with competitive compensation and benefits.