Senior System Administrator: Linux/Windows & Cloud Security

Columbia Technology Partners, Inc; Annapolis (MD); On-site; USD 90,000 - 130,000; Full time

Benefits offered by this job

Medical plans

Vision & Dental

401k

PTO & Leave

Learning stipend

Life & Disability insurance

Profit sharing

Referral bonuses

Job summary

Columbia Technology Partners, Inc. is seeking a System Administrator to support mission-critical IT systems in secure environments. You will administer Linux and Windows, manage AD/LDAP, and ensure security and compliance across enterprise services.

The role emphasizes maintaining system availability, performance, and rapid incident response in hybrid networks. A strong background in virtualization, cloud, and automation is essential.

Qualifications

• Ten years of System Administrator experience in similar environments.
• Bachelor's degree in a technical discipline; substitution of +5 years allowed.
• Active Security Clearance with polygraph (per job requirements).

Responsibilities

• Administer, maintain, and troubleshoot Linux and Windows systems from OS to application layer.
• Manage enterprise Linux platforms (RHEL, Rocky Linux, CentOS).
• Support DNS, DHCP, Active Directory, LDAP, identity management, and authentication services.
• Deploy and troubleshoot virtualized and containerized environments; support compute, storage, networking.
• Support system security, hardening, PKI, encryption, and cybersecurity tools.
• Diagnose and resolve system, network, storage, and connectivity issues to maintain availability.

Skills

Linux admin

Windows admin

AWS

VMware

KVM

Proxmox

Docker

Podman

Kubernetes

Ansible

Bash

Python

PowerShell

AD/LDAP DNS

Networking & security

Education

Bachelor's degree in a technical discipline

Tools

Active Directory

DNS/DHCP

VMware

Proxmox

Docker

Kubernetes

Ansible

PowerShell

Job description

Columbia Technology Partners, Inc. is seeking a System Administrator to support mission-critical IT systems in secure environments. You will administer Linux and Windows, manage AD/LDAP, and ensure security and compliance across enterprise services.

The role emphasizes maintaining system availability, performance, and rapid incident response in hybrid networks. A strong background in virtualization, cloud, and automation is essential.