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

Company: Phoenix Operations Group
Location: Fort Belvoir
Posted on: April 1, 2026

Job Description:

Full-time Description 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. Salary Description $110,000 - $170,000

Keywords: Phoenix Operations Group, Bel Air South , Information Systems Security Engineer (ISSE) - TS/SCI Required, IT / Software / Systems , Fort Belvoir, Maryland