Senior Systems Administrator – Secure Linux/Windows Ops

Columbia Technology Partners; Corridor North (MD); On-site; USD 90,000 - 125,000; Full time

Benefits offered by this job

Medical plans

Vision & Dental coverage

401k with company contribution

Paid time off

Career growth opportunities

Life and AD&D insurance

Profit sharing bonus

Referral bonus program

Job summary

Columbia Technology Partners is seeking a System Administrator to support mission-critical IT systems in secure environments. You will administer Linux and Windows, troubleshoot, and maintain enterprise services to ensure reliability and compliance.

The role requires hands-on expertise, strong networking, virtualization, and automation skills (Ansible, Bash, Python, PowerShell). You will uphold security standards with a U.S. citizenship and active clearance.

Qualifications

• Ten (10) years of experience as a System Administrator supporting programs of similar scope, type, and complexity.
• Bachelor’s degree in a technical discipline; five additional years may substitute for a degree.

Responsibilities

• Administer, maintain, and troubleshoot Linux and Windows systems.
• Install, configure, patch, secure, and maintain enterprise Linux platforms (RHEL, Rocky Linux, CentOS).
• Manage core infrastructure services: DNS, DHCP, Active Directory, LDAP, identity management.
• Deploy, manage, and troubleshoot virtualized and containerized environments.
• Support security, hardening, compliance, PKI, encryption, and cybersecurity tools.
• Diagnose and resolve system, network, storage, and connectivity issues.
• Provide day-to-day administration and support for mixed Linux and Windows environments.

Skills

Linux administration

Networking

Cloud/Virtualization

Ansible

Python

PowerShell

Security & Compliance

Education

Bachelor's degree in a technical discipline

5 years additional experience substituted for degree

Tools

AWS

VMware

KVM

Proxmox

Docker

Podman

Kubernetes

Job description

Columbia Technology Partners is seeking a System Administrator to support mission-critical IT systems in secure environments. You will administer Linux and Windows, troubleshoot, and maintain enterprise services to ensure reliability and compliance.

The role requires hands-on expertise, strong networking, virtualization, and automation skills (Ansible, Bash, Python, PowerShell). You will uphold security standards with a U.S. citizenship and active clearance.