Sr. System Administrator

Ridgeline International • Tysons, VA

6h • Hybrid

About The Position

We're looking for a Sr. System Administrator with 7-10 years of hands-on experience supporting, deploying, and maintaining both Linux and Windows-based systems, as well as managing networking and virtualization infrastructure. You’ll play a key role in ensuring stable, secure, and scalable environments across both internal operations and external client-facing systems.
This is a hybrid role with the flexibility to work remotely part of the week, but you’ll also be hands-on with hardware in the data center as needed.
What Makes This Role Unique
Tech-forward team: You’ll work alongside a sharp, passionate group of engineers who love what they do and love sharing what they know. Peer learning is part of the culture.
Choose your own tools: Linux, macOS, Windows, even Amiga or Commodore 64—pick your workstation OS. (Yes, really.)
Zero fluff, full impact: No red tape. No corporate theater. Just real infrastructure challenges, room to experiment, and support to grow.
High trust, high autonomy: You’ll be set up for success with the right tools, team, and environment to do your best work.
In Your First 6 Months, You’ll:
Deploy and configure Linux systems across production and staging environments
Identify and resolve infrastructure gaps or inefficiencies
Automate manual tasks in collaboration with DevOps using Bash, Python, or Ansible
Collaborate with the Network & Security team to improve system monitoring and alerting
Produce clear and usable systems documentation (we love diagrams more than essays)
Core Technologies You’ll Work With
Operating Systems: Red Hat, Ubuntu, CentOS, Windows Server
Networking: Cisco, Juniper, VLANs, routing protocols, VPNs (IPSec, Wireguard, etc.)
Virtualization & Containers: VMware, Docker
Automation & Scripting: Python, Bash, Ansible
Cloud & Hybrid: AWS, Azure
Directory & Authentication: Active Directory, DNS, Group Policy, DFSR
Security Tools: Firewalls (Fortigate, Cisco, Juniper), MACsec, TLS encryption
Endpoint Management: iOS, Android, Apple/Windows/Linux clients

Requirements

• Active Secret Clearance at a minimum
• 7-10 years managing Windows and Linux systems in production environments
• Hands-on experience in data centers: cabling, racking, hardware setup
• Solid networking knowledge (TCP/IP, OSI model, routing, switching)
• Experience with firewalls and secure tunneling protocols
• A natural curiosity for solving technical problems and learning new tools
• A collaborative mindset and strong documentation habits

Nice To Haves

• Exposure to compliance-driven or high-security environments (e.g., FedRAMP, DoD)
• Experience managing mixed OS fleets (Apple, Windows, Linux)
• Familiarity with Infrastructure-as-Code principles

Responsibilities

• Deploy and configure Linux systems across production and staging environments
• Identify and resolve infrastructure gaps or inefficiencies
• Automate manual tasks in collaboration with DevOps using Bash, Python, or Ansible
• Collaborate with the Network & Security team to improve system monitoring and alerting
• Produce clear and usable systems documentation (we love diagrams more than essays)

Benefits

• Flexible PTO + holidays
• Generous 401k match benefit up to 10%, with an automatic 3% safe harbor contribution and additional matching based on employee contributions.
• Medical (HSA & PPO Plans Available), dental, vision, disability, and life insurance
• Employer Contribution to Health Savings Account (HSA)
• Learning & Development opportunities
• Professional coaching services
• Get the technology you want to do your job
• We have free daily snacks & drinks

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed