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The Professional, Scientific, and Technical Services sector comprises establishments that specialize in performing professional, scientific, and technical activities for others. These activities require a high degree of expertise and training. The establishments in this sector specialize according to expertise and provide these services to clients in a variety of industries and, in some cases, to households. Activities performed include: legal advice and representation; accounting, bookkeeping, and payroll services; architectural, engineering, and specialized design services; computer services; consulting services; research services; advertising services; photographic services; translation and interpretation services; veterinary services; and other professional, scientific, and technical services. This sector excludes establishments primarily engaged in providing a range of day-to-day office administrative services, such as financial planning, billing and recordkeeping, personnel, and physical distribution and logistics. These establishments are classified in Sector 56, Administrative and Support and Waste Management and Remediation Services.

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Showing 1801–1850 of 5445 bids that are currently: Active.

Denotes bidding opportunities that have been amended

Illinois - US Due Date
Corporate: Metra_Reconstruct Metra-Union Pacific N Line Bridges - Surveying
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 09, 2026
Plan and Begin - Upgrade Security Phase 2
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 21, 2026
COMPREHENSIVE ZONING CODE & DESIGN GUIDELINES UPDATE
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 17, 2026
Engineering Services for Fire Alarm Systems Replacement
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026
Corporate: Tri-State Tollway (I-294) Roadway Reconstruction - CQP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 27, 2026
Corporate: Tri-State Tollway (I-294) Roadway Reconstruction - Surveying
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 27, 2026
ENGINEERING SERVICES
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 10, 2026
DESIGN DEFICIENCY CORRECTIONS FOR WOOD RIVER
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 28, 2026
Engineering Services - Stormwater Lift Station Rehabilitation - Lake A
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 09, 2026
Kinzie ES ACM Flooring Abatement 2nd Floor Various Areas Design
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026
Smyth ES ACM Flooring Abatement Various Areas Design
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026
Comprehensive Water Distribution System Analysis
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 02, 2026
Carbon Storage Capacity
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 16, 2026
Corporate: Lockport_Division Street WWTP Phase 2 - Materials Testing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 15, 2026
Corporate: Lockport_Division Street WWTP Phase 2 - Surveying
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 15, 2026
Transit Authority Consultant
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 20, 2026
Airport Maintenance for O'Hare and Midway International Airports
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 06, 2026
INSPECTION AND TESTING SERVICES FOR INFRASTRUCTURE
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 27, 2026
Corporate: Milan_WWTF Modifications - Materials Testing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 15, 2026
Corporate: Milan_WWTF Modifications - Surveying
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 15, 2026
Corporate: Battery E Activated Sludge Facility - Surveying
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 21, 2026
Corporate: Battery E Activated Sludge Facility - Quality Control
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 21, 2026
Supplemental Engineering Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026
High School Bike Path - Volkening Lake to High School, Phase III Engineering Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026
Phase III Engineering
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 21, 2026
Downtown Parking Study
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 24, 2026
Coding Audit Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 08, 2026
Banking Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026
Auditing Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 06, 2026
Tenant File Audit
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 22, 2026
Army Marketing and Advertising Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026
Army Marketing and Advertising Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026
Digital Advertising Placement Process
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 14, 2026
CSO - USTRANSCOM Information Technology (IT) Enterprise Modernization (ITEM) Solutions
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 04, 2030
CSO - USTRANSCOM Information Technology (IT) Enterprise Modernization (ITEM) Solutions
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 04, 2030
Portal & Statewide Voter Registration System
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 30, 2026
Security Video Management System
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026
Case Management System
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 10, 2026
Immunization Information System
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 29, 2026
HL2 EMU Auxiliary Power System Modernization
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 10, 2026
Environmental Information Management System
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 13, 2026
Corporate: Renovation and Addition of the Washburn Branch Library - Technology
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 01, 2026
RECREATION MANAGEMENT SYSTEM
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 11, 2026
STRATEGIC ENROLLMENT MANAGEMENT CONSULTANT SERVICES
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 02, 2026
Safety Data Sheets Database Management
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 08, 2026
Prescription Medication Delivery and Freight Management Services for a Central Fill Mail Order Pharmac
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 22, 2026
Artificial Intelligence Integration Center (AI2C) - Transformative Artificial Intelligence Research and Applications Broad Agency Announcement (BAA)
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 31, 2026
Artificial Intelligence Integration Center (AI2C) - Transformative Artificial Intelligence Research and Applications Broad Agency Announcement (BAA)
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 31, 2026
Artificial Intelligence Integration Center (AI2C) - Transformative Artificial Intelligence Research and Applications Broad Agency Announcement (BAA)
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 31, 2026
Consulting Services for Public Library
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026

Showing 1801–1850 of 5445 bids that are currently: Active.