Senior Information System Security Engineer (ISSE) (TS/SCI Clearance And Current Polygraph Required)

J&T Business Consulting; Annapolis (MD); On-site; USD 120,000 - 180,000; Full time

Job summary

J&T Business Consulting in Annapolis, MD, seeks a Senior ISSE to join a fast-paced defense program. The role requires hands-on vulnerability testing, RMF implementation, and policy assessment for multiple systems.

Candidates must have an active TS/SCI clearance with a current polygraph, IASAE Level 2 or 3, and the ability to work independently or in a team.

Qualifications

• 12+ years of ISSE experience on large technical programs.
• Strong security practices knowledge and hands-on vulnerability testing.
• Experience implementing RMF across systems.
• Ability to formulate and assess IT security policy.
• Familiarity with common security tools: Nessus, NMAP, Wireshark.
• Experience securing desktop and server OS configurations.
• Capable of multi-system work in varied configurations.
• Excellent verbal and written communication; prioritizes tasks.
• IASAE Level 2 or 3 required.
• Active TS/SCI clearance with current polygraph.

Skills

ISSE experience

Vulnerability testing

RMF proficiency

Security policy

Communication skills

Team collaboration

Prioritization

IASAE Level 2/3

Tools

Nessus

NMAP

Wireshark

Job description

Senior Information System Security Engineer (ISSE) (TS/SCI Clearance And Current Polygraph Required)

Annapolis, United States | Posted on 08/24/2026

• Must have at least 12 years of experience working as an ISSE on a large technical program.
  
• Must have a solid understanding of security practices and policies and hands-on vulnerability testing experience.
  
• Must have experience applying Risk Management Framework.
  
• Must have experience formulating and assessing IT security policy.
  
• Must have demonstrated knowledge of and experience with common security tools, such as Nessus, NMAP, and Wireshark hardware/software security implementation, communication protocol, encryption techniques/tools, and web services.
  
• Must have experience with secure configurations of commonly used desktop and server operating systems.
  
• Must be comfortable working on multiple systems and components simultaneously in various configurations.
  
• Must have strong verbal and written communication skills.
  
• Must be committed to adopting and adhering to best practices.
  
• Must be able to effectively plan and prioritize tasking and communicate clearly regarding technical options and trade-offs.
  
• Must be capable of performing high-quality work both independently and with a team in a fast-moving environment.
  
• IASAE Level 2 or 3 required.
  
• Active TS/SCI security clearance with a current polygraph is required