Castellum
Castellum

28 Castellum Jobs Hiring Near You

Network Administrator

Lakehurst, NJ · On-site

$95K - $120K/yr

JOB SUMMARY Specialty Systems, Inc. has an opening for a Network Administrator with the below described skills and experience to join our team of technical professionals supporting our Department of ...

PKI Engineer

Aberdeen Proving Ground, MD · On-site

$140K - $160K/yr

**CONTINGENT UPON FUNDING AND AWARD** JOB SUMMARY Corvus Consulting, LLC is seeking a PKI Engineer to support the evaluation, testing, development, deployment, and maintenance of Public Key ...

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Senior Data Scientist

Washington, DC · On-site

$155K - $165K/yr

Company Description Castellum is composed of three subsidiaries Corvus Consulting, Specialty Systems, and GTMR. We are a technology company focused on leveraging the power of information technology ...

Red Hat Platform Engineer

Lakehurst, NJ · On-site

$110K - $130K/yr

JOB SUMMARY Specialty Systems, Inc. has an opening for a RED Hat Platform Engineer to join our team of technical professionals supporting Government customers and national security mission ...

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Red Hat Platform Engineer

Lakehurst, NJ · On-site

$110K - $130K/yr

Company Description Castellum is composed of three subsidiaries Corvus Consulting, Specialty Systems, and GTMR. We are a technology company focused on leveraging the power of information technology ...

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Castellum Jobs Information

What is it like to work at Castellum?

Castellum is a real estate company that prioritizes sustainability and long-term thinking, fostering a culture that emphasizes responsibility and environmental stewardship.

As a leading property company in the Nordic region, Castellum operates a diverse portfolio of properties, including office spaces, logistics facilities, and retail centers, with a focus on creating value for both its customers and the environment. The company's mission is to create a better everyday life for people and businesses through its properties and services.

Working at Castellum may appeal to professionals who are passionate about sustainability, property management, and customer-centric service, as the company offers opportunities for career growth and development in a dynamic and rapidly evolving industry.
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Infographic showing various job openings at Castellum in the United States as of June 2026, with employment types broken down into 100% Full Time. Highlights an 100% Physical job distribution.
Red Hat Platform Engineer with Security Clearance

Red Hat Platform Engineer with Security Clearance

Castellum, Inc

Lakehurst, NJ

Other

Posted 12 days ago


Job description

JOB SUMMARY Specialty Systems, Inc. has an opening for a RED Hat Platform Engineer to join our team of technical professionals supporting Government customers and national security mission requirements. In this role, you will support the design, implementation, automation, and sustainment of Red Hat Enterprise Linux (RHEL)-based platform environments supporting mission-critical defense systems and software-intensive applications. The position involves working within Government-provided environments while supporting secure infrastructure operations, platform modernization, DevSecOps integration, and system lifecycle management activities. As a member of the Specialty Systems team, you will contribute directly to secure and reliable platform solutions that support critical defense and intelligence missions. This position is located at our customer site location. In this position, you will work our customer’s Compressed Work Schedule which consists of working four 9-hour days (M-Th) and an 8-hour day (F) for the first week of a cycle followed by four 9-hour days (M-Th) and being off on the second Friday for the second week of a cycle. This results in a 3-day weekend every other week! RESPONSIBILITIES Design, implement, and maintain Red Hat Enterprise Linux (RHEL)-based platform infrastructure across development, test, and operational environments
Automate system provisioning, configuration management, deployment, and documentation using Infrastructure-as-Code (IaC) tools
Administer Linux systems including system hardening, patching, upgrades, and lifecycle management
Support containerized environments utilizing Docker, Podman, Kubernetes, and OpenShift technologies
Integrate platform capabilities into DevSecOps pipelines and CI/CD workflows
Implement and maintain security controls in compliance with DoD cybersecurity requirements including STIGs and RMF
Monitor system performance, troubleshoot platform issues, and ensure reliability, scalability, and availability
Manage storage, file systems, and system resources to optimize system performance
Support virtualization and cloud-based environments including VMware, OpenStack, AWS, or similar technologies
Collaborate with software development, systems engineering, cybersecurity, and test teams to support system integration and operational readiness
Maintain system documentation, architecture diagrams, configuration baselines, and technical procedures
Identify technical risks and support continuous improvement and modernization initiatives across platform environments QUALIFICATIONS: Minimum Qualifications Include: Bachelor’s degree in Computer Science, Engineering, Information Systems, or related technical discipline preferred
Equivalent work experience may be considered in lieu of degree requirements
Active Secret Clearance required or ability to obtain and maintain a Secret Clearance
Minimum of 5 years of experience supporting Linux systems administration and engineering, preferably within RHEL-based environments
Security+ CE certification or ability to obtain certification within 3–6 months of hire
Strong experience administering and engineering Red Hat Enterprise Linux (RHEL) environments
Experience with scripting and automation using Bash, Python, Ansible, Terraform, or similar tools
Experience supporting containerization and orchestration technologies including Docker, Podman, Kubernetes, and OpenShift
Familiarity with DevSecOps methodologies and CI/CD pipeline integration
Working knowledge of networking concepts, Linux security, and infrastructure operations
Experience implementing and maintaining STIG compliance and RMF security controls
Strong troubleshooting, analytical, and problem-solving skills
Excellent written and verbal communication skills
Ability to work effectively within collaborative Government and contractor team environments Preferred Qualifications: Experience supporting Navy, NAVAIR, or DoD programs
Red Hat certifications such as RHCSA or RHCE
Experience supporting enterprise Kubernetes or OpenShift environments
Experience with cloud-based infrastructure and virtualization technologies
Familiarity with secure platform modernization initiatives and mission-critical system environments
Experience supporting classified or highly regulated environments Specialty Systems, Inc. provides equal employment opportunity (EEO) to all employees and applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability status, genetic information, marital status, ancestry, protected veteran status, or any other characteristic protected by applicable federal, state, and local laws and offers equal opportunity for VEVRAA Protected Veterans. Specialty Systems, Inc. will not discriminate against employees and job applicants who inquire about, discuss, or disclose compensation information. Reasonable accommodation that do not cause an undue hardship on the company may be made to enable individuals with disabilities to perform essential functions, as long as that would not hinder or prevent performance of duties or be of a safety concern. PHYSICAL DEMANDS: The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of the job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. While performing the duties of this job, the employee is required to reach with hands and arms. The employee is frequently required to sit, stand and walk. The employee may be required to move ten pounds and could occasionally lift or move up to twenty-five pounds. Disclaimer: The listed duties are not intended to serve as a comprehensive list of all duties performed by all employees in this classification, only a representative summary of primary duties and responsibilities.