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

J&T Business Consulting; New York (NY); On-site; USD 120,000 - 180,000; Full time

Job summary

J&T Business Consulting seeks a System Administrator - Level 3 (TS/SCI with Full Scope Polygraph) in Columbia, United States. The role demands a technical degree or equivalent experience and an extensive SA background, including 15 years of SA work and 15 years Linux experience, with an active TS/SCI clearance and polygraph.

This on-site position requires security credentials and a strong Linux skill set. The candidate will operate in a highly secure environment with access to sensitive systems.

Qualifications

• Bachelor’s degree in a technical discipline 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.
• Active TS/SCI security clearance with a current polygraph is required.

Skills

Linux

TS/SCI clearance

Education

Bachelor degree in technical discipline

5 years substituted for degree

15 years SA experience

Job description

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

Columbia, United States | Posted on 08/11/2026

• 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