NAICS 541611 Administrative management and general management consulting services vendors in Illinois
In FY2026 (provisional), vendors headquartered in Illinois recorded $93.54M in net obligations under NAICS 541611 across 55 awards and orders.
- FY2026 net obligations (provisional)
- $93.54M
- FY2026 awards and orders
- 55
- FY2026 vendors
- 23
- FY2027 to date
- -$547.51K
- 2 awards and orders so far
Top vendors, FY2026
- 1. HURON CONSULTING SERVICES LLC (CHICAGO, IL)$28.86M · 3
- 2. NATIONAL OPINION RESEARCH CENTER (Chicago, IL)$21.15M · 14
- 3. VANDER WEELE GROUP LLC (HIGHLAND PARK, IL)$9.63M · 1
- 4. FEDERAL SPECIALIZED SERVICES, LLC (CHICAGO, IL)$8.75M · 1
- 5. C5T CORPORATION (SCOTT AIR FORCE BASE, IL)$6.40M · 2
- 6. COLLEGE OF AMERICAN PATHOLOGISTS (NORTHFIELD, IL)$5.95M · 1
- 7. WBK ENGINEERING LLC (SAINT CHARLES, IL)$5.10M · 8
- 8. MISSION METRICS LLC (Chicago, IL)$3.25M · 1
- 9. GRANT THORNTON LLP (CHICAGO, IL)$1.81M · 3
- 10. ATTADALE PARTNERS, LLC (SCHAUMBURG, IL)$1.02M · 1
Agencies paying these vendors
- $27.45M
- Department of Veterans Affairs (6 awards and orders)
- $23.72M
- Department of Health and Human Services (14 awards and orders)
- $13.38M
- Department of War (6 awards and orders)
- $9.63M
- Department of Homeland Security (1 awards and orders)
- $6.51M
- Department of the Interior (13 awards and orders)
- $5.20M
- National Science Foundation (2 awards and orders)
- $3.41M
- General Services Administration (1 awards and orders)
- $3.24M
- Department of Energy (1 awards and orders)
Related
- State
- Vendors in Illinois
Net obligations by fiscal year of action, from FPDS contract actions under NAICS 541611. Vendors are placed by their headquarters state in SAM.gov, not by where the work is done. Awards and orders count canonical awards with a positive net in the year; IDV vehicles are not counted. FY2026 is provisional for 120 days after it ends, and DoD withholds awards for 90 days at the source. Methodology