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Job Description:
Parsons is seeking an experienced Linux Systems Security Engineer to design, implement, secure, and maintain enterprise Linux infrastructure. The ideal candidate will have strong hands-on experience with Red Hat Enterprise Linux or Rocky Linux, enterprise identity and infrastructure services, cybersecurity hardening, and Security Technical Implementation Guide STIG application.
This position will support the development and operation of secure, scalable Linux enterprise solutions, including identity management, configuration management, networking services, source-code management, authentication, security logging, and vulnerability management.
This role supports a hybrid schedule and requires presence in Centreville, VA 3 days per week.
What You'll Be Doing:
- Design, implement, administer, and secure Rocky Linux environments.
- Develop and maintain enterprise Linux solutions using:
- FreeIPA
- Pulp/Foreman
- RADIUS
- DHCP
- DNS
- GitLab
- STIG application and compliance baselines
- Apply security hardening standards to Linux systems in accordance with applicable STIGs, organizational security policies, and regulatory requirements.
- Configure centralized authentication, authorization, identity management, and access controls.
- Aid development of system architectures, technical implementation plans, standard operating procedures, and security documentation.
- Automate system deployment, configuration, patching, and compliance activities where appropriate.
- Troubleshoot complex operating system, application, networking, authentication, and infrastructure issues.
- Support vulnerability assessment, remediation, and continuous security monitoring activities.
- Collaborate with network, cybersecurity, virtualization, systems administration, and application team members.
- Participate in system design reviews, risk assessments, incident response, and change-management processes.
- Mentor junior engineers and contribute to operational standards and best practices.
- Ensure systems are configured for availability, performance, maintainability, and security.
What Required Skills You'll Bring:
- U.S. Citizenship and an active TS/SCI clearance
- Bachelor’s degree and 5+ years of experience in Cybersecurity, Computer Science, Information Technology, or a related field. Additional years of experience may be considered in lieu of a dregree.
- Current IAT Level II certification or higher, such as:
- Security+
- SSCP
- CySA+
- GSEC
- CCNA Cyber Ops
- Another qualifying certification under applicable DoD or organizational requirements
- Demonstrated professional experience administering and securing Red Hat Enterprise/Rocky Linux environments.
- Experience designing, implementing, and supporting Linux enterprise solutions that include:
- FreeIPA
- Pulp/Foreman
- RADIUS
- DHCP
- DNS
- Enterprise Security Logging
- STIG application and system hardening
- Strong understanding of Linux security controls, authentication, authorization, encryption, access management, patch management, and vulnerability remediation.
- Experience troubleshooting enterprise systems in production environments.
- Ability to create and maintain technical documentation, diagrams, configuration standards, and implementation procedures.
- Strong communication, analytical, problem-solving, and collaboration skills.
What Desired Skills You'll Bring:
- Experience with network engineering and administration, particularly Juniper technologies.
- RHCSA certification or higher.
- JNCIA certification or higher.
- Experience with VMware vSphere administration and virtualization technologies.
- Experience implementing OpenSearch or similar platforms for security logging, monitoring, and analysis.
- Experience configuring and operating ACAS/Tenable for vulnerability assessment and scanning.
- Experience with enterprise hardware configuration, provisioning, installation, and deployment.
- Knowledge of automation and infrastructure-as-code tools such as Ansible, Git, Bash, and Python.
- Experience supporting highly regulated, government, defense, or security-sensitive environments.
- Familiarity with cybersecurity frameworks, configuration management, vulnerability management, and continuous monitoring practices.
Security Clearance Requirement:
An active Top Secret SCI security clearance is required for this position.This position is part of our Federal Solutions team.The Federal Solutions segment delivers resources to our US government customers that ensure the success of missions around the globe. Our intelligent employees drive the state of the art as they provide services and solutions in the areas of defense, security, intelligence, infrastructure, and environmental. We promote a culture of excellence and close-knit teams that take pride in delivering, protecting, and sustaining our nation's most critical assets, from Earth to cyberspace. Throughout the company, our people are anticipating what’s next to deliver the solutions our customers need now.Salary Range: $103,500.00 - $181,100.00We value our employees and want our employees to take care of their overall wellbeing, which is why we offer best-in-class benefits such as medical, dental, vision, paid time off, 401(k), life insurance, flexible work schedules, and holidays to fit your busy lifestyle!This position will be posted for a minimum of 3 days and will continue to be posted for an average of 30 days until a qualified applicant is selected or the position has been cancelled.Parsons is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, veteran status or any other protected status.We truly invest and care about our employee’s wellbeing and provide endless growth opportunities as the sky is the limit, so aim for the stars! Imagine next and join the Parsons quest—APPLY TODAY!Parsons is aware of fraudulent recruitment practices. To learn more about recruitment fraud and how to report it, please refer to https://www.parsons.com/fraudulent-recruitment/.
Skills Required
- U.S. citizenship
- Active Top Secret/SCI security clearance
- Bachelor's degree in Cybersecurity, Computer Science, Information Technology, or a related field; additional experience may substitute
- 5+ years of relevant professional experience
- Current IAT Level II certification or higher, such as Security+, SSCP, CySA+, GSEC, or CCNA Cyber Ops
- Professional experience administering and securing Red Hat Enterprise Linux or Rocky Linux environments
- Experience with FreeIPA, Pulp/Foreman, RADIUS, DHCP, DNS, enterprise security logging, STIG application, and system hardening
- Understanding of Linux security controls, authentication, authorization, encryption, access management, patch management, and vulnerability remediation
- Experience troubleshooting enterprise systems in production environments
- Ability to create technical documentation, diagrams, configuration standards, and implementation procedures
- Strong communication, analytical, problem-solving, and collaboration skills
- Network engineering and administration experience, particularly with Juniper technologies
- RHCSA certification or higher
- JNCIA certification or higher
- VMware vSphere administration and virtualization experience
- OpenSearch or similar security logging and monitoring platform experience
- ACAS/Tenable vulnerability assessment and scanning experience
- Enterprise hardware configuration, provisioning, installation, and deployment experience
- Experience with Ansible, Git, Bash, and Python for automation and infrastructure as code
- Experience supporting regulated, government, defense, or security-sensitive environments
- Familiarity with cybersecurity frameworks, configuration management, vulnerability management, and continuous monitoring
Parsons Corporation Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Parsons Corporation and has not been reviewed or approved by Parsons Corporation.
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Retirement Support — Retirement programs are framed as a major value driver, with an ESOP alongside a 401(k) match and additional stock-purchase options contributing meaningfully to total rewards. This structure is positioned as especially attractive for employees who value long-term wealth-building over immediate cash.
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Healthcare Strength — Health coverage is described as broad and choice-rich, with multiple plan types (PPO, HDHP, and some HMO networks) plus dental, vision, EAP, and wellness resources. The availability of different plan designs and national-carrier coverage supports varied employee needs.
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Leave & Time Off Breadth — Time-off offerings are portrayed as competitive, including PTO, holidays, flexible schedules such as a 9/80 option for eligible roles, and floating holidays in the U.S. Paid parental leave of 160 hours is also highlighted as a meaningful component of the overall package.
Parsons Corporation Insights
What We Do
Parsons is a digitally enabled solutions provider with a focus on making the world safer, smarter, healthier, more sustainable, and more connected. Founded in 1944, Parsons primarily serves the defense, security, and infrastructure markets. Uniquely qualified to deliver cyber/converged security, technology-based intellectual property, and other innovative services, the corporation delivers state-of-the-art solutions to federal, regional, and local government agencies as well as to private industrial customers worldwide. Parsons has a reputation for inclusion and diversity and has been named to the Ethisphere Institute’s list of World’s Most Ethical Companies for 10 consecutive years. Parsons facilitates a culture of innovation by encouraging collaboration among its employees and providing opportunities for career growth. With offices around the globe, people of varied talents and backgrounds, and a wide range of exciting projects, the possibilities at Parsons are endless. For more about Parsons, visit www.parsons.com. Mission: Delivering innovative infrastructure, defense, and security solutions to enable a more sustainable, safer, smarter, and more connected world.
