Senior Information Systems Security Engineer Security Clearance

Position: Senior Information Systems Security Engineer with Security Clearance
Company Overview XPECT Solutions, LLC has built a strong reputation by supporting our clients in meeting their strategic goals and mission objectives. We provide high quality resources for a wide range of IT and security solutions at best-value pricing. Our success is built on a solid foundation of well-vetted, highly technical personnel, a disciplined project management approach, and an overarching commitment to customer service.

We develop, test, deploy, and support exceptional solutions that enhance system functionality, while maximizing reliability and availability, and ensure the tightest security. Job Overview: XPECT Solutions is looking for a Senior Information System Security Engineer (ISSE). The Sr. ISSE is responsible for designing, developing, and integrating secure information systems. Working closely with architects, developers, and security teams, the Sr. ISSE ensures that security requirements are embedded throughout the system lifecycle—from initial design to deployment and maintenance.

This role involves conducting threat modeling, implementing security architectures, and validating system compliance with applicable standards such as NIST, RMF, and DoD directives. The Sr. ISSE is instrumental in bridging the gap between cybersecurity policy and technical implementation. Core Responsibilities
- Lead, mentor, and supervise a team of security professionals responsible for the end-to-end implementation of the RMF lifecycle for the client's IT systems
- Oversee and coordinate preparation activities, ensuring roles, responsibilities, and risk management strategies are clearly defined and maintained
- Guide system categorization efforts to ensure all information systems are appropriately classified based on mission/business impact and regulatory requirements.

- Direct the selection, tailoring, and documentation of security controls aligned with system categorizations and compliance requirements
- Oversee the implementation of technical, operational, and management controls throughout system and application life cycles, with a particular focus on quality and completeness of all deliverables
- Ensure comprehensive security control assessments are planned, executed, and documented to validate the effectiveness of implemented safeguards
- Prepare risk management documentation for system authorization and executive decision making
- Direct ongoing monitoring and continuous assessment activities, collecting metrics to adjust security strategies and ensure sustained compliance
- Serve as a principal technical advisor on cybersecurity, bringing subject-matter expertise to risk analysis, incident response, system remediation, and audit support efforts
- Foster a culture of security awareness, providing technical guidance and training to both team members and stakeholders
- Track, report, and communicate status, risks, and improvement opportunities related to security engineering activities to leadership and stakeholders
- Maintain up-to-date knowledge of RMF, NIST guidance, and industry best practices in support of continuous process improvement Requirements:

- ACTIVE TOP SECRET CLEARANCE
- Bachelor’s degree in Computer Science, Cybersecurity, or other cyber discipline - 8+ years of relevant experience
- Proven experience with security tools including Tenable Nessus and/or Security Center, IBM Guardium, HP Webl Inspect, Network Mapper (NMAP), and/or similar applications
- Hold at least one of the following certifications:

- Certified Information Systems Security Professional (CISSP) (or Associate) - CompTIA Advanced Security Practitioner (CASP) or CompTIA Security X Certification
- Certified Secure Software Lifecycle Professional (CSSLP) - CISSP
- Information System Security Engineering Professional(ISSEP) - CISSP
- Information System Security Architecture Professional (ISSAP) - Proven experience leading multi‑disciplinary cybersecurity, engineering, and program teams, including staff assignment, technical oversight, and performance management.

- Demonstrated ability to manage complex programs and budgets, including call orders, subcontract oversight, financial forecasting, and development of required program…