System Administrator - Level 3 (TS/SCI with Full Scope Polygraph)

J&T Business Consulting; New York (NY); On-site; USD 130,000 - 190,000; Full time

Job summary

J&T Business Consulting seeks a System Administrator - Level 3 (TS/SCI with Full Scope Polygraph) to support high-security programs in Columbia, United States. The role requires an active TS/SCI clearance with a current polygraph and extensive Linux experience.

Candidates must have a technical bachelor’s degree or equivalent, 15 years SA experience in similar scopes, and 15 years of Linux expertise. Substitution of a bachelor’s degree with five additional years of SA experience is allowed.

Qualifications

• Bachelor’s degree in a technical discipline required.
• Five (5) years of additional SA experience may substitute for a bachelor’s degree.
• Fifteen (15) years of SA experience in programs and contracts of similar scope, type, and complexity is required.
• Fifteen (15) years of Linux experience required.
• Active TS/SCI security clearance with a current polygraph is required.

Skills

Linux experience

TS/SCI with polygraph

Education

Bachelor’s degree in a technical discipline

Job description

System Administrator - Level 3 (TS/SCI with Full Scope Polygraph)

Columbia, United States | Posted on 08/20/2026

• Bachelor’s degree in a technical discipline from an accredited college or university is required.
  
• Five (5) years of additional SA experience may be substituted for a bachelor’s degree.
  
• Fifteen (15) years of experience as an SA in programs and contracts of similar scope, type, and complexity is required.
  
• 15 years of Linux experience
  
• Active TS/SCI security clearance with a current polygraph is required