Information Systems Security Engineer (ISSE) (TS/SCI Clearance with Full Scope Polygraph Required)

J&T Business Consulting; Annapolis (MD); On-site; USD 80,000 - 150,000; Full time

Benefits offered by this job

Health insurance

401(k) retirement plan

PTO & holidays

Tuition reimbursement

Job summary

J&T Business Consulting in Annapolis Junction, MD, is seeking a Senior Information Systems Security Engineer (ISSE) to support large-scale, mission-critical systems. You will validate system security requirements, design robust architectures, and perform hands-on vulnerability assessments in an Agile environment.

Active TS/SCI with Polygraph is required; the role emphasizes RMF planning, security testing, and policy enforcement across enterprise desktops and servers.

Qualifications

• Understanding RMF and applying security controls across systems.
• Experience in vulnerability assessment and remediation planning.
• Experience with security architecture design for complex networks.

Responsibilities

• Validate and establish system security designs, architectures, and requirements for major system components and distributed network interfaces.
• Apply RMF to lead security planning, risk assessments, control evaluations, monitoring, and authorization activities.
• Perform vulnerability testing, scanning, auditing, and assessment using standard security tools.
• Collaborate with engineering, test, and agile development teams during PI planning to formulate security requirements.
• Plan and conduct security verification testing for cryptographic devices.
• Formulate and enforce information security policies and baselines.
• Evaluate operational security impact of new software deployments and drive remediation.
• Advise on security architecture and risk trade-offs for program managers and stakeholders.

Skills

RMF expertise

Vulnerability assessment

Security architectures

Network analysis

CISSP knowledge

Education

Bachelor's degree in CS/ Information Assurance

CISSP or CISSP-ISSEP

Tools

Nessus

NMAP

Wireshark

Job description

Information Systems Security Engineer (ISSE) (TS/SCI Clearance with Full Scope Polygraph Required)

Annapolis, United States | Posted on 10/11/2026

Position: Information Systems Security Engineer (ISSE)

Location: Annapolis Junction, MD

Employment Type: Full-Time

Clearance Requirement: Active TS/SCI with Polygraph

Salary Range: $80,000 – $150,000 / year (dependent on experience, education, and skill set)

About the Role

Seeking a Senior Information Systems Security Engineer (ISSE) to support large-scale, mission-critical systems across a complex, geographically distributed network environment in Annapolis Junction, MD.
In this role, you will serve as a security subject matter expert, validating system security requirements, designing robust security architectures, and executing hands‑on vulnerability assessments. You will collaborate closely with Systems Engineering, Test, and Integration teams in an Agile environment to ensure hardware and software implementations meet stringent compliance standards and maintain a resilient operational security posture.

Key Responsibilities

• Validate and establish system security designs, architectures, and requirements for major system components and distributed network interfaces.
• Apply the Risk Management Framework (RMF) to lead security planning, risk assessments, control evaluations, continuous monitoring, and system authorization activities.
• Perform vulnerability testing, scanning, auditing, and assessment of system configurations using standard security tools (e.g., Nessus, NMAP, Wireshark).
• Collaborate with engineering, test, and agile development teams during Program Increment (PI) planning to formulate security compliance requirements for new capabilities.
• Plan and conduct security verification testing for Type 1 cryptographic and security-relevant devices.
• Formulate, coordinate, implement, and enforce information systems security policies, technical standards, and configuration baselines.
• Evaluate the operational security impact of new software deployments, identify vulnerabilities and attack vectors, and drive end‑to‑end remediation.
• Act as a primary technical advisor on security architecture and risk trade-offs for Program Managers, internal engineering teams, and customer stakeholders.

Required Qualifications & Experience

• Security Clearance: Active TS/SCI with Polygraph.
• Experience: Minimum of 12 years of experience as an ISSE on large technical programs.
• Certifications: DoD 8570/8140 IASAE Level 2 or Level 3 certification.
• Risk & Policy Frameworks: Proven experience applying the Risk Management Framework (RMF) and formulating/assessing IT security policies and compliance standards.
• Technical & Tool Expertise: Hands‑on experience with vulnerability scanning and network analysis tools (e.g., Nessus, NMAP, Wireshark), communication protocols, encryption techniques/tools, and web services.
• System Administration: In‑depth experience with the secure configuration and hardening of standard enterprise desktop and server operating systems.

Desired Qualifications

• Bachelor’s degree in Computer Science, Information Assurance, Information Systems Security Engineering, or a related field.
• Professional certifications: CISSP or CISSP-ISSEP.
• 5+ years of experience with Defense-in-Depth principles (access control, PKI, IAM, network and enterprise security architectures).
• Experience with scripting languages and automated testing workflows.
• Experience with advanced penetration testing tools, incident response, and application security evaluations for firewall designs and network boundaries.

Benefits & Compensation

• Comprehensive Health, Dental, and Vision Insurance
• Basic Life and Disability Insurance
• Paid Time Off (PTO) and Paid Holidays
• 401(k) Retirement Plan with Company Match
• Tuition Reimbursement for continued professional education

An Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or any other characteristic protected under federal, state, or local law.