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Information Systems Security Engineer (ISSE) - TS/SCI Required

Fort Belvoir, VA

August 18, 2025

Phoenix Operations Group is on the hunt for a passionate and skilled Information Systems Security Engineer (ISSE) ready to make an impact. In this role, you’ll architect and design cutting-edge system and network solutions that span multiple secure enclaves — including environments with complex data protection and classification needs.


You’ll dive into exciting projects that leverage distributed architectures and cloud-based technologies tailored for big data applications. This is your chance to work on mission-critical systems that matter.


This is a hands-on, on-site role — five days a week — perfect for those who thrive in a fast-paced, collaborative, and innovation-driven environment.


Are you ready to be part of something bigger?


Essential Job Responsibilities:

  • Create, review and edit authorization documentation for completeness and accuracy in accordance with federal and DoD policy. 
  • Thoroughly understand and be able to implement DoD RMF system accreditation processes.
  • Assess use case and operational risk of integrated open source, and GOTS/COTS software components. 
  • Use vulnerability management systems, automated security scanning tools, and system accreditation record systems. 
  • Ability to grasp new concepts, facilitate information exchanges for data gathering, and collaborate with diverse audiences. 
  • Follow established processes where applicable, and establish and execute defensible processes where none are prescribed.
  • Provide security planning, assessment, risk analysis, and risk management support. 
  • Recommend system-level solutions to resolve security requirements and guide the development team in meeting the security posture requirements. 
  • Support the Government in the enforcement of the design and implementation of trusted relationships among external systems and architectures. 
  • Apply existing knowledge of IA policy, procedures, and workforce structure to design, develop, and implement secure networking, computing, and enclave environments.
  • Must be able to interact well with others to complete work.

Required Skills:

  • Active TS/SCI level U.S. Government clearance is required
  • 9+ years of experience as an ISSE with large multi-tiered programs and Bachelor's in related field; OR 7 years relevant experience with Master's in related field; OR High School Diploma or equivalent and 13 years relevant experience.
  • Experience implementing DoD system accreditation processes (DIACAP acceptable and RMF preferred).
  • A working knowledge of TCP/IP suite of protocols and services, computer architectures, and network topologies is required.
  • DoD 8570 compliance with IAT Level II (SSCP, Security+, CCNA-Security, or GSEC certification)
  • Experience with DISA STIGs and SRGs, vulnerability management systems, mitigation and compliance processes, and reviewing results from automated security scanning tools.
  • Ability to work independently and as part of a team is needed.
  • Flexibility is essential to adapt to schedule changes as needed.

Desired Skills: 

  • CISSP-ISSEP is highly desired

Benefits Offered:


Medical, Dental, Vision Insurance - 100% Company Paid Premiums

STD, LTD, and Life Insurance - 100% Company paid

401K – Automatic 10% company contribution; no matching required

PTO - 4 weeks/year

Holidays - 11 paid/year

Birthdays off with pay

Referral Bonuses – Upfront AND Annually Recurring

Open Source Bonuses – Contribute to our Github projects

Professional Development – Paid training, Certifications, and Enrichment


ABOUT PHOENIX OPERATIONS GROUP:


Phoenix Operations Group is a high-end engineering services company dedicated to protecting and advancing our national cyber resources. As a small company, we rely on innovation to continually advance our employees' skills and provide game-changing solutions to our customers.


Our technical competencies include Big Data analytics (batch and streaming), Cloud Computing infrastructure, multi-INT visualization, and enterprise architectures. We support operational missions (All-Source, Financial, CND) and serve as Product Owners for our open-source research initiatives.


Please visit us at http://www.phoenix-opsgroup.com for more information.


Phoenix Operations Group is an Equal Opportunity Employer. Phoenix Operations Group does not discriminate based on race, religion, color, sex, gender, gender identity, sexual orientation, age, non-disqualifying physical or mental disability, national origin, veteran status, or any other basis covered by appropriate law. All employment is decided based on qualifications, merit, and business needs.

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What our employees say

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Very interesting work. Management is top-notch. Great pay and benefits. Lots of learning and training opportunities.

Sr. Software Engineer
Columbia, MD

Fellow employees are some of the most talented and happy people I've had the pleasure of working with. Phoenix tries and succeeds at doing right by them and everyone stays happy with the company and leadership.

Software Engineer
Aberdeen Proving Ground

Challenging work with excellent compensation. Responsive and caring management team that are committed to building a long term relationship with their employees. They are very supportive about improving your career. Small company culture with big benefits and perks.

Senior Systems Engineer
Aberdeen Proving Ground

Phoenix has been very accommodating to schedules and commutes. Phoenix is also actively interested in giving back to the community and regularly hosts events to support different charitable groups. Management is responsive and actively tries to make sure employees have what they need.

Sr. Software Engineer
Aberdeen Proving Ground

Phoenix is by far the best company I have worked for, both professionally and personally. Leadership is dependable and honest. They go out of their way to ensure that their employees are taken care of as well as on a career path that suits their desires as well as strengths. There are also plenty of growth opportunities in regards to professional development. Amazing company.

Recruiter
Columbia, MD

In the past at other federal defense contractors what you often see is that people are treated as replaceable cogs. Money runs out for a contract and either the person has to find their own replacement work or they get no choice but to find different work at a new job. This past year with the tumult of continuing resolutions I've been impressed on how agile Phoenix has been in finding and getting coverage for all their various projects at various locations. They treat people like assets instead of replaceable parts.

Systems Integrator
Charleston, South Carolina

Management has helped me further develop my technical skills and has supported me in all my professional and personal development objectives. I can't say enough good things about the management. The company is fairly young and still small. If you're looking for a better place to work, then here it is. They work hard to get you into positions that are challenging and that align not only with the company objectives but most importantly yours.

Sr. Software Engineer
Virginia
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