Systems Administrator II/III - Cybersecurity

Systems Administrator II/III - Cybersecurity Middletown, RI, United States req1754 Posted on: 3/2/2026 SEACORP is seeking a well-qualified Systems Administrator II/III - Cybersecurity.

Primary Duties and Responsibilities:

Job Summary:

 SEACORP is seeking a talented and passionate System Administrator to join our Electronic Warfare team in Middletown, RI. This is an exciting opportunity to play a critical role in securing and maintaining cutting-edge systems that support vital national security initiatives. You'll be at the heart of our operations, working on a team that designs, builds, and maintains the infrastructure that powers our critical mission. As a key member of our team, you'll leverage your expertise in Linux systems, networking, and cybersecurity best practices to ensure the reliability, security, and performance of our systems. If you thrive in a dynamic environment, enjoy problem-solving, and are committed to continuous learning in the ever-evolving cybersecurity landscape, we encourage you to apply!

Job Responsibilities Include:

Build, Secure, and Maintain:

System administration tasks, upgrades, security hardening, and maintenance of critical systems, including hardware and software components.

Network Architect:

Configure, manage, and troubleshoot Layer 2 and Layer 3 network switches, ensuring a robust and secure network infrastructure.

Security Champion:

Implement and maintain security best practices, including DISA STIGs, and contribute to our compliance with

NIST 800-53, NIST

800-171, and CMMC frameworks.

Troubleshoot and Resolve:

Diagnose and resolve complex hardware and software issues, minimizing downtime and ensuring optimal system performance.

Documentation Master:

Create and maintain comprehensive documentation of internal processes, procedures, and system configurations.

On-Site Support:

Travel to customer locations for system installations, upgrades, and repairs (approximately 5% travel).

End User Support:

Provide end-user support for system-related issues, ensuring a positive user experience.

Essential Skills and Experience:

Solid understanding of interfacing subsystems, hardware, and software components. Proficiency in Shell/Bash scripting for automation and system management. Deep understanding of Red Hat Enterprise Linux (RHEL) administration and networking principles. Proven ability to build systems from the ground up and effectively troubleshoot hardware and software issues. Ability to understand requirements, perform analysis, and document software or system requirements. Ability to design and develop solutions both independently and collaboratively within a team. Excellent multitasking and time management skills. Ability to clearly document technical solutions for both internal and external audiences.

Desired Skills and Experience:

Extensive experience with Red Hat Enterprise Linux (RHEL) in an enterprise environment. Experience with virtualization technologies (e.g., VMware, KVM). Familiarity with containerization technologies such as Docker or Podman. Working knowledge of Cisco and Arista network switches. Experience creating RPM packages for software deployment. Experience automating IT tasks using Ansible. Experience creating Kickstart installation media. Hands-on experience implementing DISA STIGs for systems and network devices. Familiarity with cybersecurity frameworks, including

NIST 800-53, NIST

800-171, and CMMC.

Qualifications:

Education:

 Bachelor's Degree in Computer Science, Networking, Engineering, Information Technology, or a related field. Equivalent experience, including advanced military technical training (e.g., Navy "C" School) with demonstrated capabilities, will also be considered. CompTIA Security+ certification is required or must be obtained within 6 months of employment.

Experience:

Systems Administrator I:

Degree Only.

Systems Administrator II:

3+ years of relevant experience.

Systems Administrator III:

7+ years of relevant experience. Military service or applicable experience can be substituted at a rate of 2 years of service/experience for each year of degree requirement.

Security Clearance:

 U.S. citizenship and the ability to obtain and maintain a Secret-level DoD security clearance are required. A current clearance is highly preferred.

Location:

Middletown, RI Travel:

Infrequently (

Clearance:

Secret Work Environment & Physical Demands:

Office & Computer Laboratories - Sitting, standing, extended periods of time using a mouse and keyboard and viewing computer screens. Infrequent lifting of