> Markdown version of [/jobs/ext/2289640-senior-system-administrator](https://www.wearedevelopers.com/jobs/ext/2289640-senior-system-administrator). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior System Administrator

- **Company:** Mount Indie
- **Location:** Washington, DC, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), JavaScript (Programming Language), Apache Ant, Apache HTTP Server, Apache Tomcat, Cloud Computing, Cyber Security, Databases, Linux, Federal Information Processing Standards (FIPS), Hibernate (Java), Apache Hypertext Transfer Protocol Server, Java Persistence API, Spring Framework, Java API for RESTful Web Services (JAX-RS), PostgreSQL, Linux System Administration, MongoDB, Oracle (Applications), Red Hat Enterprise Linux, Apache Solr, SQL Databases, Selinux, Oracledb
- **Published:** August 29, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9127403/senior-system-administrator

## About the Role

* Strong Linux and systems administration experience.
 * An active TS/SCI clearance is required.
 * A CI Polygraph is preferred, and candidates with an existing polygraph will be prioritized.
 * Candidates with an active TS/SCI without a CI Polygraph may still be considered when their technical qualifications are a strong match.

Highly Desired

 * Oracle experience.
 * Cloud computing experience.
 * Cybersecurity experience.
 * SQL experience.

## Description

We are hiring a Senior Systems Administrator to support mission-critical applications in a secure environment. This is an opportunity for an experienced systems professional with strong Linux administration expertise to work across modern and legacy technologies supporting essential applications.

Oracle experience is highly valued for this role, particularly for candidates who can support legacy application environments. Candidates with the right combination of technical expertise and clearance eligibility will be well positioned to contribute.

What You'll Do

 * Administer and support Linux-based systems and environments.
 * Support mission-critical applications and the underlying infrastructure they depend on.
 * Work with legacy application and database environments, including OracleDB.
 * Support systems operating on Red Hat Enterprise Linux 7, 8, and 9.
 * Work with security and system administration technologies including FIPS, SELinux, firewalld, and fapolicyd.
 * Support application environments utilizing technologies such as Java, JPA, JAX-RS, JCE, Hibernate, Spring, JavaScript, Apache Ant, Apache HTTPD, and Apache Tomcat.
 * Work with databases and related technologies including Apache Solr, PostgreSQL, MongoDB, and OracleDB.
 * Apply general Linux system administration expertise to maintain and support secure technical environments.


## Related Videos

- [Hacking MSSQL on Cloud. All of them. How I became sysadmin on Azure, AWS, GCP and Alibaba.](https://www.wearedevelopers.com/videos/100339-hacking-mssql-on-cloud-all-of-them-how-i-became-sysadmin-on-azure-aws-gcp-and-alibaba)
- [40 Minutes to Build a Serverless COVID-19 REST and GraphQL APIs](https://www.wearedevelopers.com/videos/208-40-minutes-to-build-a-serverless-covid-19-rest-and-graphql-apis)
- [Enhancing Workload Security in Kubernetes](https://www.wearedevelopers.com/videos/356-enhancing-workload-security-in-kubernetes)
- [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker)
- [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers)
- [NoSQL Data Modeling for Front-end Developers](https://www.wearedevelopers.com/videos/297-nosql-data-modeling-for-front-end-developers)

## Related Articles

- [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again)
- [93 Java Interview Questions You Should Prepare For](https://www.wearedevelopers.com/magazine/14-93-java-interview-questions-you-should-prepare-for)
- [Top 10 Java Libraries](https://www.wearedevelopers.com/magazine/364-top-10-java-libraries)
- [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)
- [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology)
- [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing)