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Unix Security Engineer Jobs (NOW HIRING)

Agile Defense

Security Engineer

Springfield, VA

$120K - $140K/yr

FO Security Engineer Clearance: Secret Location: Springfield, VA The Security Engineering Team (SET ... and UNIX/Linux based), including laptops, desktops, PDAs, printers, mobile computing devices ...

GDIT

DevSecOps Security Engineer

WV · On-site +1

Yes DevSecOps Security Engineer Help us simplify the complex as a DevSecOps Security Engineer at ... Linux/Unix administration (RHEL or CentOS preferred). * Compliance: Active Security+ Certification ...

Bowhead

ISSE/Systems Security Engineer

King George, VA · On-site

$130K - $140K/yr

Overview ISSE/SYSTEMS SECURITY ENGINEER (RDTE) Bowhead is seeking an experienced ISSE/Systems ... Must have knowledge of basic to advanced UNIX and Windows system administration. Current knowledge ...

Bowhead

ISSE/Systems Security Engineer

King George, VA · On-site

$110K - $130K/yr

Overview ISSE/SYSTEMS SECURITY ENGINEER (RDTE) Bowhead is seeking an experienced ISSE/Systems ... Must have knowledge of basic to advanced UNIX and Windows system administration. Current knowledge ...

Bowhead

ISSE/Systems Security Engineer

King George, VA · On-site

$110K - $130K/yr

Overview ISSE/SYSTEMS SECURITY ENGINEER (RDTE) Bowhead is seeking an experienced ISSE/Systems ... Must have knowledge of basic to advanced UNIX and Windows system administration. Current knowledge ...

Bowhead

ISSE/Systems Security Engineer

King George, VA · On-site

$110K - $130K/yr

Overview ISSE/SYSTEMS SECURITY ENGINEER (RDTE) Bowhead is seeking an experienced ISSE/Systems ... Must have knowledge of basic to advanced UNIX and Windows system administration. Current knowledge ...

Bowhead

ISSE/Systems Security Engineer

King George, VA · On-site

$130K - $140K/yr

Overview ISSE/SYSTEMS SECURITY ENGINEER (RDTE) Bowhead is seeking an experienced ISSE/Systems ... Must have knowledge of basic to advanced UNIX and Windows system administration. Current knowledge ...

TechOpps Inc.

Network Security Engineer

Annapolis, MD · Remote

$107K - $146K/yr

The Network Security Engineer will actively participate in planning and coordinating the design ... Unix, and Linux OS (8) Packet/Protocol Analysis using Opnet, Riverbed, Wireshark, and taps. (9) ...

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Unix Security Engineer information

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$61.5K

$152.8K

$205.5K

How much do unix security engineer jobs pay per year?

As of Sep 10, 2026, the average yearly pay for unix security engineer in the United States is $152,773.00, according to ZipRecruiter salary data. Most workers in this role earn between $143,000.00 and $158,500.00 per year, depending on experience, location, and employer.

What does a Unix Security Engineer do?

A Unix Security Engineer is responsible for maintaining and enhancing the security of Unix-based systems within an organization. Their tasks include implementing security measures, monitoring systems for vulnerabilities, managing user access, and responding to security incidents. They often work closely with IT teams to ensure compliance with security policies and to protect sensitive data. Additionally, they may conduct security audits, update patches, and configure firewalls and intrusion detection systems specific to Unix environments.

What are some typical challenges a Unix Security Engineer faces when implementing security measures in large organizations?

Unix Security Engineers often encounter challenges related to legacy systems, diverse Unix variants, and balancing security requirements with operational needs. Integrating modern security tools with older infrastructure can be complex, and ensuring consistent policy enforcement across a heterogeneous environment requires strong coordination with IT and network teams. Additionally, responding to evolving threats while maintaining system uptime and performance is a common balancing act in large organizations.

What are the key skills and qualifications needed to thrive as a Unix Security Engineer, and why are they important?

To thrive as a Unix Security Engineer, you need in-depth knowledge of Unix/Linux operating systems, cybersecurity principles, scripting languages (such as Bash or Python), and a relevant degree or certifications like CISSP or CompTIA Security+. Familiarity with security tools (e.g., firewalls, intrusion detection systems), system hardening techniques, and compliance frameworks is typically required. Strong analytical thinking, problem-solving skills, and the ability to communicate security issues clearly are essential soft skills. These competencies are critical for proactively safeguarding systems, identifying vulnerabilities, and ensuring organizational security standards are met.

What cities are hiring for Unix Security Engineer jobs?

Cities with the most Unix Security Engineer job openings:

What states have the most Unix Security Engineer jobs?

States with the most job openings for Unix Security Engineer jobs include:

What are popular job titles related to Unix Security Engineer jobs?

For Unix Security Engineer jobs, the most frequently searched job titles are:

Infographic showing various Unix Security Engineer job openings in the United States as of September 2026, with employment types broken down into 85% Full Time, 13% Part Time, and 2% Contract. Highlights an 90% Physical, 2% Hybrid, and 8% Remote job distribution, with an average salary of $152,773 per year, or $73.4 per hour.

Security Engineer

Springfield, VA

Agile Defense
IT Services • 201 - 500 employees
Learn more about Agile Defenseexternal

$120K - $140K/yr

Full-time

Re-posted 25 days ago

Key responsibilities

  • Maintain, configure, and install hardware and software within the Enterprise Analysis System (EAS).

  • Support special projects by performing engineering and system administration services on FO systems in various environments, including on-premises, cloud, and wireless.

  • Implement automation, design documentation, and support security functions such as system health monitoring, updates, and change management.

Job description

About Agile Defense
 
At Agile Defense we know that action defines the outcome and new challenges require new solutions. That’s why we always look to the future and embrace change with an unmovable spirit and the courage to build for what comes next.
 
Our vision is to bring adaptive innovation to support our nation's most important missions through the seamless integration of advanced technologies, elite minds, and unparalleled agility—leveraging a foundation of speed, flexibility, and ingenuity to strengthen and protect our nation’s vital interests.

Requisition #: 1289
Job Tittle: FO Security Engineer
Clearance: Secret
Location: Springfield, VA
 
The Security Engineering Team (SET) is required to provide network maintenance and special projects engineering support. The SET maintains, configures, and installs all supported hardware and software residing within Enterprise Analysis System (EAS) and provides support for all Focused Operations (FO) engineering special projects. This team performs engineering and system administration services on all FO systems located in on premises, in the cloud and in wireless environments. These systems include threat emulation, custom big data analytics, open-source and COTS/Government of the Shelf (GOTS) tools as listed below:
 
• Cyber Threat Detection Tools
• Case Tracking Tool - CASPR (JIRA, Confluence)
• Enterprise Tactical Operations Tool
• eDiscovery and Forensics Tools - EnCase, FTK, Nuix
• Hunting and Threat Emulation Tools - Analysts VM's
• Focused Operations Networks - Palo Alto FW's, Dell Switches
• Threat Detection Tools - McAfee ePO, DTEX
• Other FO Development Projects (As Assigned)
 
In support of EAS the SET will perform the following tasks:
Implement automation and orchestration capabilities within the FO environment.
Design and develop documentation for on-premises and cloud-based solutions provided.
Documentation includes standard operating procedures (SOPs), technical documentation, diagrams, etc.
Provide support for TSA PKI functions, including system administrative support for creating and setting up certificates on systems.
Must provide analysis related to the design, development, security and integration of hardware/software interfaces and all system level requirements to provide an integrated IT solution.
Perform health and wellness monitoring of the FO FISMA Systems.
Perform administration, maintenance, and updates of forensic applications to ensure they remain functional.
Ensure that updates to applications and systems shall be carefully planned and scheduled so as to not affect any on-going or active investigations.
Review the health and well-being of all security technologies including firewall, router, VPN, IDS sensors, proxies, wireless, PKI, and switch changes within FO FISMA Systems. The results of which shall be captured and reported in the monthly Focused Operations Network Health and Wellness Reports deliverable on a monthly basis.
Travel to locations where EAS devices are located for system administration and/or repair if needed.
Ensure that all changes required follow the proper Request for Change (RFC) process, have been approved through the appropriate Change Control Board (CCB) and are properly tested before deployment to the production FO FISMA Systems.
Recommend and implement technologies/changes that will enhance the operations and/or security of the FO FISMA Systems.
Document all recommendations and changes and provide it to the FO Branch Manager, or his designee.
Ensure that all TSA change control processes are followed, and all changes are approved prior to implementation.
Coordinate with other TSA offices to have FO technologies implemented within the TSA Systems.
Create and deliver Security and Vulnerability Status reports by all systems managed on a monthly basis.
Administer, review and provide recommendations for the following devices, both hardware and software (Windows, Macintosh and UNIX/Linux based), including laptops, desktops, PDAs, printers, mobile computing devices, mobile electronic media, Active Directory Servers, member servers, other workgroup servers outside of the main Active Directory realm, other technology devices such as forensic write blocking, and imaging for the FO FISMA Systems.
Assist in the management of all Operating Systems, tools and applications utilized by IAD Security Engineers, as needed.
Develop integrated system test requirement, strategies, devices and systems.
Conduct overall system level testing and security testing.
Design and integrate information security suites, tools, capabilities into delivered solutions to ensure federal and commercial security best practices.
 
Daily Responsibilities:
Update tickets in JIRA
Check ePO server to verify there no issues and make sure antivirus definitions are updated
Keep WSUS server up-to-date to include approving/declining patches and database maintenance
Ensure all equipment is functioning as necessary
Ensure backups are completed and successful
Attend all meetings scheduled and provide necessary feedback to the team
Review logs for anomalies
Remediating/Mitigation of all security issues
Updating/Creating documentation as needed
Ensuring that all OLC Training is completed
Provide input to ISVMs and other requests from the ISSO
Assist other teams with requirements or issues they may be having
Our Core Values
 
Employees of Agile Defense are our number one priority, and the importance we place on our culture here is fundamental. Our culture is alive and evolving, but it always stays true to its roots. Here, you are valued as a family member, and we believe that we can accomplish great things together. Agile Defense has been highly successful in the past few years due to our employees and the culture we create together. 
 
What makes us Agile? We call it the 6Hs, the values that define our culture and guide everything we do. Together, these values infuse vibrancy, integrity, and a tireless work ethic into advancing the most important national security and critical civilian missions. It's how we show up every day. It's who we are.
 
  • Happy - Be Infectious. Happiness multiplies and creates a positive and connected environment where motivation and satisfaction have an outsized effect on everything we do.
  • Helpful - Be Supportive. Being helpful is the foundation of teamwork, resulting in a supportive atmosphere where collaboration flourishes, and collective success is celebrated.
  • Honest - Be Trustworthy. Honesty serves as our compass, ensuring transparent communication and ethical conduct, essential to who we are and the complex domains we support.
  • Humble - Be Grounded. Success is not achieved alone, humility ensures a culture of mutual respect, encouraging open communication, and a willingness to learn from one another and take on any task.
  • Hungry - Be Eager. Our hunger for excellence drives an insatiable appetite for innovation and continuous improvement, propelling us forward in the face of new and unprecedented challenges.
  • Hustle - Be Driven. Hustle is reflected in our relentless work ethic, where we are each committed to going above and beyond to advance the mission and achieve success.
 
Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.