Systems Administrator 3 - 30920

HII's Mission Technologies division; Nellis Air Force Base Census-Designated Place (NV); On-site; USD 95,000 - 130,000; Full time

Job summary

Mission Technologies, a Division of HII, seeks a Systems Administrator 3 to support modeling, simulation and training at the Joint Integrated Test and Training Center – Nellis. Primary focus is Linux system support for the Joint Simulation Environment (JSE) at JITTC-N, NV.

Responsibilities include configuring and maintaining RHEL/SLES, applying DISA STIGs, and ensuring RMF accreditation. Requires Top Secret clearance and strong collaboration with teams and vendors.

Qualifications

• 5 years relevant experience with Bachelors in related field; 3 years relevant experience with Masters in related field; 0 years experience with PhD or Juris Doctorate in related field; or High School Diploma or equivalent and 9 years relevant experience.
• Experience with LINUX system administration.
• Strong troubleshooting skills in hardware and software contexts, including integration with diverse display solutions.
• Demonstrated knowledge of network administration principles as they apply to simulator systems.
• Awareness of and adherence to information security best practices.
• Proficiency in performing configuration management and collaborating with other configuration managers.
• Detail-oriented and capable of managing complex systems in a high-stakes environment.
• Must have had an active Top Secret clearance within the last 24 months.

Responsibilities

• Maintain Linux systems to support the Joint Simulation Environment (JSE) at the JITTC-N.
• Set up administrator and user service accounts; patch and maintain RHEL and SLES systems.
• Apply and validate DISA STIGs; support RMF accreditation.
• Coordinate installation of software/hardware upgrades and ensure backups.
• Develop and monitor policies for resource allocation; document processes and procedures.
• Collaborate with users and vendors to optimize system performance.

Skills

Linux system administration

Troubleshooting hardware/software

Network administration principles

Information security best practices

Configuration management

Technical documentation

Team collaboration

Education

Bachelor's degree in related field

Master's degree in related field

PhD or Juris Doctorate in related field

High School Diploma or equivalent

Tools

Red Hat Enterprise Linux (RHEL)

SUSE Linux Enterprise Server (SLES)

DISA STIGs remediation

RMF accreditation

JSE familiarity

Job description

Employment Type:Full Time/Salaried/Exempt

Anticipated Salary Range:$95,416.00-$130,000.00

Security Clearance:Top Secret

Level of Experience:Mid

Meet HII’s Mission Technologies Division

Our team of more than 7,000 professionals worldwide delivers all-domain expertise and advanced technologies in service of mission partners across the globe. Mission Technologies is leading the next evolution of national defense – the data evolution - by accelerating a breadth of national security solutions for government and commercial customers. Our capabilities range from C5ISR, AI and Big Data, cyber operations and synthetic training environments to fleet sustainment, environmental remediation and the largest family of unmanned underwater vehicles in every class. Find the role that’s right for you. We look forward to meeting you.

To learn more about Mission Technologies, click here for a short video: https://vimeo.com/732533072

Leadership at HII is a mindset, not a title. Through our Leadership Capability Framework, we define how every employee grows, leads, and contributes—regardless of role. It sets the standard for how you can develop yourself and what you can expect from leaders across our organization. We look for candidates who want to grow in alignment with these capabilities:

• Know & Grow Your People– Commit to learning and supporting team success.
• Build Relationships– Communicate openly, collaborate well, and build trust.
• Take Ownership– Deliver on commitments and take pride in your work.
• Customer First– Focus on the mission and those we serve.
• Shape the Future– Bring ideas, curiosity, and continuous improvement.
• Act with Urgency – Take initiative and follow through with purpose.

These capabilities guide how all employees contribute to our shared success across Mission Technologies.

Job Description

Mission Technologies, a Division of HII is seeking a Systems Administrator 3 to support Modeling, Simulation and Training at the Joint Integrated Test and Training Center – Nellis (JITTC-N), Nellis AFB, NV. The individual’s primary responsibility will center on providing Linux system support to ensure optimal performance within Joint Simulation Environment (JSE) at the JITTC-N.

Maintain continuous operation of multi-user computer systems to ensure effective support of missions and the Joint Simulation Environment (JSE) is operating at optimal performance levels. This will include, but are not limited to:

• Setting up administrator and user service accounts.
• Administer, patch, and maintain Red Hat Enterprise Linux (RHEL) 8 and 9 systems.
• Administer, patch, and maintain SUSE Linux Enterprise Server (SLES) 11 SP4 and 12 SP5 systems.
• Installing system-wide software and allocate mass storage space.
• Performing configuration management and troubleshooting of systems which may be physical or virtual/server based.
• Apply and validate DISA STIGs and remediate vulnerability scan findings in support of RMF accreditation
• Optimize system operation and resource utilization and perform system capacity analysis and planning.
• Assist users in accessing and utilizing systems.
• Interact with users and evaluate vendor products.
• Make recommendations to purchase hardware and software.
• Coordinate installation of new and upgraded software and hardware, as well as provide fail‑safe and backup systems.
• Develop and monitor policies and standards for allocations related to the use of available computing resources.
• Adhere to best practices in securely storing, backing up, and archiving data.
• Documenting processes related to database design, configuration, and performance.
• Adhere to and enforce cybersecurity best practices and procedures, particularly in multi-level secure environments.
• Maintain vigilance to protect sensitive systems and data across classified enclaves.

Minimum Qualifications

• 5 years relevant experience with Bachelors in related field; 3 years relevant experience with Masters in related field; 0 years experience with PhD or Juris Doctorate in related field; or High School Diploma or equivalent and 9 years relevant experience.
• Experience with LINUX system administration.
• Strong troubleshooting skills in both hardware and software contexts, including integration with diverse display solutions.
• Demonstrated knowledge of network administration principles as they apply to simulator systems.
• Awareness of and adherence to information security best practices.
• Proficiency in performing configuration management and collaborating with other configuration managers.
• Detail-oriented and capable of managing complex systems in a high‑stakes environment.
• Ability to write processes for simulator technicians and engineers.
• Strong oral and written communication and organizational skills to produce and maintain technical documents and procedures.
• Ability to create and maintain data logging procedures and reports in order to identify issues and submit deficiency reports (DRs) to relevant SMEs to find and resolve required solutions and future requirements.
• Must be able to work in a team environment.
• Must have had an active Top Secret clearance within the last 24 months.

Preferred Requirements

• Active DoD Top Secret/SCI security clearance.
• Certifications: Linux+ and COMPTIA+/Security+.
• Experience in JSE, preferably as a Systems Administrator.
• Previous experience with operating and maintaining Red Hat Enterprise Linux (RHEL).
• Experience in software design, test and implementation within DoD flight simulators.
• Experience contributing to the system design or architecture of new and current systems.
• Experience with Agile software practices.
• Experience supporting Special Access Program (SAP) efforts.
• Excellent oral and written communications skills.
• BS in Computer Science or Computer Engineering. Degrees in Engineering, Math, and Physics may qualify with at least 1 year of C++ and/or Python experience.

Physical Requirements

Office, industrial, or shipboard environment. Capable of climbing ladders and tolerating confined spaces and extreme temperature variances. Lifting and moving materials may be required.

Benefits HII is more than a job - it’s an opportunity to build a new future. We offer competitive benefits such as best-in-class medical, dental and vision plan choices; wellness resources; employee assistance programs; Savings Plan Options (401(k)); financial planning tools, life insurance; employee discounts; paid holidays and paid time off; tuition reimbursement; as well as early childhood and post‑secondary education scholarships. Bonus/other non‑recurrent compensation is occasionally offered for qualified positions, and if applicable to this role will be addressed by the recruiter at the screening phase of application.

The listed salary range for this role is intended as a good faith estimate based on the role's location, expectations, and responsibilities. When extending an offer, HII's Mission Technologies division takes a variety of factors into consideration which include, but are not limited to, the role's function and a candidate's education or training, work experience, and key skills.

Why HII We build the world’s most powerful, survivable naval ships and defense technology solutions that safeguard our seas, sky, land, space and cyber. Our workforce includes skilled tradespeople; artificial intelligence, machine learning (AI/ML) experts; engineers; technologists; scientists; logistics experts; and business administration professionals.

Recognized as one of America’s top large company employers, we are a values and ethics driven organization that puts people’s safety and well‐being first. Regardless of your role or where you serve, at HII, you’ll find a supportive and welcoming environment, competitive benefits, and valuable educational and training programs for continual career growth at every stage of your career.

Together we are working to ensure a future where everyone can be free and thrive.

All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, physical or mental disability, age, or veteran status or any other basis protected by federal, state, or local law.

Do You Need Assistance? If you need a reasonable accommodation for any part of the employment process, please send an e‑mail to [e-mail] and let us know the nature of your request and your contact information. Reasonable accommodations are considered on a case‑by‑case basis. Please note that only those inquiries concerning a request for reasonable accommodation will be responded to from this email address. Additionally, you may also call 1-844-849-8463 for assistance. Press #3 for HII Mission Technologies.