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Leffler Consulting
Leffler Consulting
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Gaithersburg, MD
Chantilly, VA
East Andover, NH
Fairfax, VA
Reston, VA
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Leffler Consulting
in last 30 days
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Last 30 days
Acquisition Support Engineer – TS/SCI Clearance w/CI Poly Required
APPLY
Leffler Consulting
Gaithersburg, MD
L6 Lead
September 2nd, 2026
Purchasing Agents, Except Wholesale, Retail, and Farm Products
Engineering Services
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Space Systems Engineer – TS/SCI Clearance w/CI Poly Required
APPLY
Leffler Consulting
Gaithersburg, MD
L6 Lead
September 2nd, 2026
Aerospace Engineers
Space Research and Technology
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Senior Program Control Analyst – TS/SCI Clearance w/CI Poly Required
APPLY
Leffler Consulting
Gaithersburg, MD
L5 Senior
September 2nd, 2026
Budget Analysts
Administrative Management and General Management Consulting Services
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Senior Program Control Analyst – TS/SCI Clearance w/CI Poly
APPLY
Leffler Consulting
Gaithersburg, MD
L6 Lead
August 29th, 2026
Budget Analysts
Administrative Management and General Management Consulting Services
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Senior Data Scientist - TS/SCI Clearance required
APPLY
Leffler Consulting
Gaithersburg, MD
L5 Senior
September 4th, 2026
Data Scientists
Other Scientific and Technical Consulting Services
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Sr. Asset Management Specialist - TSSCI required
APPLY
Leffler Consulting
Gaithersburg, MD
L6 Lead
September 4th, 2026
Financial Specialists, All Other
Administrative Management and General Management Consulting Services
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Senior Space Systems Engineer - TS/SCI + Poly
APPLY
Leffler Consulting
Chantilly, VA
L6 Lead
September 4th, 2026
Aerospace Engineers
Space Research and Technology
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Space Systems Engineer - TS/SCI Clearance w/CI Poly
APPLY
Leffler Consulting
Chantilly, VA
L6 Lead
September 4th, 2026
Aerospace Engineers
Space Research and Technology
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Spacecraft Payload Engineer - CI Polygraph required
APPLY
Leffler Consulting
Gaithersburg, MD
L6 Lead
August 28th, 2026
Aerospace Engineers
Space Research and Technology
Show all >
Acquisition Support Engineer - CI Polygraph REQUIRED
APPLY
Leffler Consulting
Gaithersburg, MD
L6 Lead
August 28th, 2026
Purchasing Agents, Except Wholesale, Retail, and Farm Products
Engineering Services
Show all >
Budget Analyst - CI Polygraph required
APPLY
Leffler Consulting
Gaithersburg, MD
L5 Senior
August 28th, 2026
Budget Analysts
Other General Government Support
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Action Officer - TS/SCI with CI Polygraph
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Leffler Consulting
Gaithersburg, MD
L5 Senior
September 6th, 2026
Business Operations Specialists, All Other
Other Scientific and Technical Consulting Services
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Earned Value Management (EVM)/Integrated Performance Management (IPM) Analyst – SME Level – TS/SCI Clearance w/CI Poly Required
APPLY
Leffler Consulting
Gaithersburg, MD
L5 Senior
September 2nd, 2026
Management Analysts
Administrative Management and General Management Consulting Services
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Senior Systems Developer/Analyst - Secret Clearance required
APPLY
Leffler Consulting
Reston, VA
L6 Lead
September 4th, 2026
Software Developers
Computer Systems Design Services
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Audit Consultants (Entry and Junior Levels) – TS/SCI Clearance
APPLY
Leffler Consulting
Fairfax, VA
L5 Senior
September 18th, 2026
Accountants and Auditors
Other Management Consulting Services
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Cost Analyst/Estimator – TS/SCI Clearance w/CI Poly Required
APPLY
Leffler Consulting
Gaithersburg, MD
L5 Senior
September 2nd, 2026
Cost Estimators
Other Scientific and Technical Consulting Services
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Administrative Assistant/Legal Secretary
APPLY
Leffler Consulting
Gaithersburg, MD
L3 Junior
August 22nd, 2026
Secretaries and Administrative Assistants, Except Legal, Medical, and Executive
Other Scientific and Technical Consulting Services
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Staff Accountant - Secret Clearance required
APPLY
Leffler Consulting
Washington, DC
L6 Lead
August 22nd, 2026
Accountants and Auditors
National Security
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Senior Software Developer - Secret Clearance required
APPLY
Leffler Consulting
East Andover, NH
L6 Lead
August 31st, 2026
Software Developers
Custom Computer Programming Services
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Senior Systems Developer/Analyst - Secret Clearance required
APPLY
Leffler Consulting
East Andover, NH
L6 Lead
September 9th, 2026
Software Developers
Computer Systems Design Services
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Executive Assistant - TS/SCI with Polygraph required
APPLY
Leffler Consulting
Gaithersburg, MD
L3 Junior
September 4th, 2026
Secretaries and Administrative Assistants, Except Legal, Medical, and Executive
Administrative Management and General Management Consulting Services
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EVM/IPM Analyst - TS/SCI required
APPLY
Leffler Consulting
Gaithersburg, MD
L5 Senior
September 6th, 2026
Management Analysts
Other Scientific and Technical Consulting Services
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Resource Analyst (Budget) - TS/SCI with Polygraph required
APPLY
Leffler Consulting
Gaithersburg, MD
L5 Senior
September 6th, 2026
Budget Analysts
Administrative Management and General Management Consulting Services
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Schedule Analyst - TS/SCI with CI Polygraph
APPLY
Leffler Consulting
Gaithersburg, MD
L3 Junior
August 27th, 2026
Project Management Specialists
Other Scientific and Technical Consulting Services
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Space Systems Analyst - TS/SCI with CI Polygraph required
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Leffler Consulting
Gaithersburg, MD
L5 Senior
September 1st, 2026
Aerospace Engineering and Operations Technologists and Technicians
Space Research and Technology
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Ground Network Systems Engineer – TS/SCI Clearance w/CI Poly Required
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Leffler Consulting
Gaithersburg, MD
L6 Lead
September 2nd, 2026
Computer Systems Engineers/Architects
Computer Systems Design Services
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Spacecraft Attitude Control Systems Engineer – TS/SCI Clearance w/CI Poly Required
APPLY
Leffler Consulting
Gaithersburg, MD
L6 Lead
September 2nd, 2026
Aerospace Engineers
Space Research and Technology
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Schedule Analyst SME – TS/SCI Clearance w/CI Poly Required
APPLY
Leffler Consulting
Gaithersburg, MD
L5 Senior
September 2nd, 2026
Project Management Specialists
Other Scientific and Technical Consulting Services
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Senior Budget Analyst – TS/SCI Clearance w/CI Poly Required
APPLY
Leffler Consulting
Gaithersburg, MD
L5 Senior
September 2nd, 2026
Budget Analysts
Administrative Management and General Management Consulting Services
Show all >
Audit Consultants (Entry and Junior Levels) – TS/SCI Clearance Required
APPLY
Leffler Consulting
Fairfax, VA
L5 Senior
September 19th, 2026
Accountants and Auditors
Other Management Consulting Services
Show all >