Information Systems Security Engineer; ISSE Security Clearance

Position: Information Systems Security Engineer (ISSE) with Security Clearance
About the Opportunity APK Solutions is looking for an experienced Information Systems Security Engineer (ISSE) to support a mission-driven customer and help strengthen the security posture of enterprise-level systems. This position is ideal for someone who thrives in a collaborative, high-impact environment and wants to play a strategic role in ensuring secure operations across critical programs. Why Work for APK Solutions?

APK Solutions is a fast-growing, people-first Gov Con company that prioritizes employee well-being, professional growth, and mission success. We offer highly competitive compensation, comprehensive benefits, employer-paid healthcare options, generous PTO, 401(k) with company contributions, annual bonuses, and unmatched flexibility. Our culture is built on trust, transparency, and taking care of our people—because great work happens when employees are supported and appreciated.

Key Responsibilities
-Lead automated security testing using enterprise-level vulnerability scanning tools.
-Prepare and deliver monthly vulnerability assessment reports, ensuring findings are documented and addressed.
-Produce monthly privileged user and administrator audit reports to support compliance requirements.
-Serve as the security lead to ensure systems remain compliant, protected, and appropriately access-controlled.
-Work with technical personnel to develop and maintain Plans of Action and Milestones (POAMs).
-Support the Program Manager in drafting and updating the Contract Security Plan.
-Collaborate with the customer’s ISSM and participate in the INFOSEC Program Council as needed.
-Develop, update, and manage the program’s System Security Plan (SSP) as part of the A&A process.
-Provide required security training, awareness materials, and documentation for customer review.
-Maintain the program’s Automated Information Systems (AIS) Plan and ensure alignment with mission and policy requirements.

Required Qualifications

- Experience:

4–7 years in cybersecurity, information assurance, or security engineering with demonstrated expertise in:
-Application security frameworks, secure coding practices, and relevant security standards.
-Accreditation & Authorization (A&A) documentation, processes, POAM development, and remediation workflows.
-Security requirements for ATO/ATD environments, including encryption practices, auditing/monitoring, role-based access, and information assurance controls.
-Partnering with engineering teams to integrate and implement required security controls.
-Working within Agile/Scrum environments and supporting iterative development cycles.
-Candidates must already hold an active TS/SCI with Full Scope Polygraph to be considered. EEO Statement APK Solutions is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.