Senior System Administrator

Mount Indie; Washington (District of Columbia); On-site; USD 120,000 - 160,000; Full time

Job summary

Mount Indie seeks a Senior Systems Administrator to support mission-critical DIA systems with hands-on Linux expertise. You’ll manage enterprise environments, apply security controls, and leverage Oracle experience for legacy workloads.

Ideal candidates bring 10+ years in systems administration, security clearance, and a strong background in Red Hat Linux, cloud, and SQL. This onsite role offers exposure to high-assurance environments and complex infrastructure.

Qualifications

• Hands-on Linux administration of enterprise systems.
• Experience supporting mission-critical applications.
• Strong security/compliance awareness (FIPS, SELinux).
• Oracle experience for legacy environments.

Responsibilities

• Administer Linux-based enterprise systems for DIA.
• Support mission-critical applications and infrastructure onsite.
• Collaborate with security and cloud teams.

Skills

Security+ certification

Linux administration

TS/SCI clearance

Education

Bachelor’s degree

Master’s degree preferred

Tools

OracleDB

Red Hat Enterprise Linux

Cloud computing

SQL

Job description

We’re looking for a Senior Systems Administrator to support mission-critical applications and infrastructure for the DIA. This is a hands‑on Linux administration role where deep experience supporting enterprise systems will be especially valuable. Oracle experience is highly desired, particularly for environments supporting established and legacy applications.

What You’ll Work With

• Application technologies: Java, JPA, JAX-RS, JCE, Hibernate, Spring, JavaScript, Apache Ant, Apache HTTPD, and Apache Tomcat
• Databases: Apache Solr, PostgreSQL, MongoDB, and OracleDB
• Platforms and security: Red Hat Enterprise Linux 7/8/9, FIPS, SELinux, firewalld, fapolicyd, and general Linux system administration

What You’ll Bring

• 10+ years of relevant professional experience
• Bachelor’s degree at minimum; a Master’s degree is preferred
• Security+ certification
• Strong Linux and systems administration experience
• Active TS/SCI with CI Poly is preferred. For the right candidate, an TS/SCI without a CI Poly may be sufficient. Candidates with Poly credentials will be prioritized.
• Oracle experience is highly desired
• Experience with cloud computing, cybersecurity, and SQL is highly desired

Location

This is a full-time onsite position supporting operations at DIA HQ in Washington, DC, Reston, VA, or College Park, MD.

A recent CI Poly is preferred to help support onboarding timelines.

Bring your experience and Linux expertise to a mission‑critical environment where reliable systems matter.