| ABT Electronics, Inc | Appliances and Electronics | IT and Electronics | 
 Sustainable |
| Lonza Walkersville | Appliances and Electronics | IT and Electronics |
|
| AVI SPL | Audio Visual (AV) Integration Services | IT and Electronics | |
| AVI Systems | Audio Visual (AV) Integration Services | IT and Electronics | |
| Conference Technologies | Audio Visual (AV) Integration Services | IT and Electronics | |
| Diversified | Audio Visual (AV) Integration Services | IT and Electronics | |
| Pace Systems | Audio Visual (AV) Integration Services | IT and Electronics | |
| Titan Electric | Audio Visual (AV) Integration Services | IT and Electronics | |
| Complete Book and Media Supply | Books, DVDs, CDs | Office |
Sustainable |
| Pipette Calibration | Calibration Services | Laboratory | |
| Scales and Balances Calibration | Calibration Services | Laboratory | |
| Amazing Edibles | Catering | Food Services | |
| Catered by Design | Catering | Food Services | |
| Catering by Michael's | Catering | Food Services | |
| Food for Thought | Catering | Food Services | |
| Jewell Events Catering | Catering | Food Services | |
| Limelight | Catering | Food Services | |
| Northwestern Dining | Catering | Food Services | |
| AT&T | Cell Phones | IT and Electronics | |
| T-Mobile | Cell Phones | IT and Electronics | |
| Canteen | Coffee and Pantry Supplies | Food Services |
Sustainable |
| Apple Computers | Computers | IT and Electronics |
Sustainable |
| CDW-G Computers (Lenovo) | Computers | IT and Electronics |
Sustainable |
| Dell | Computers | IT and Electronics |
Sustainable |
| CDW-G | Computer Supplies | IT and Electronics |
|
| Amazon Business | Consumer and Retail Products | Office |
|
| Ricoh USA, Inc. | Copiers | Office | Sustainable |
| Customs Vendor - Deltamax | Customs Clearance and Freight | Mail and Shipping | |
| DriveSavers Inc. | Data Recovery Services | IT and Electronics | |
| Databank IMX | Document Imaging | Office | |
| Datamation Imaging Services | Document Imaging | Office | |
| Quartet Digital Printing | Duplicating Services | Printing | |
| Connexion | Electrical Supplies | Maintenance Supplies (MRO) and Facilities Services |
|
| Steiner Electric | Electrical Supplies | Maintenance Supplies (MRO) and Facilities Services |
|
| Digi-Key Electronics | Electronic Components | IT and Electronics |
Sustainable |
| Specialty Underwriters | Equipment Maintenance | Laboratory | |
| Executive Search Firms | Executive Search Services | Professional Services | |
| FedEx | Express Mail | Mail and Shipping | |
| Continua Interiors - MillerKnoll | Furniture | Office | Sustainable |
| Forward Space, LLC - Steelcase | Furniture | Office | Sustainable |
| BOS - Haworth | Furniture | Office |
Sustainable |
| Henricksen-Allsteel | Furniture | Office |
|
| Laboratory Builders, Inc. | Furniture | Office | Sustainable |
| Ready Refresh (formerly Ice Mountain) | Grocery Services | Food Services | Sustainable |
| Arcwood Environmental | Hazardous Waste Removal | Laboratory | |
| Guest Supply | Hospitality Items | Maintenance Supplies (MRO) and Facilities Services |
|
| Club Quarters | Hotels | Travel | Sustainable |
| DoubleTree by Hilton, Chicago MagMile | Hotels | Travel | Sustainable |
| Graduate Evanston | Hotels | Travel | |
| Hilton Garden Inn Chicago North Shore/Evanston | Hotels | Travel | |
| Hilton Orrington/Evanston | Hotels | Travel | |
| Holiday Inn Chicago North-Evanston | Hotels | Travel | |
| Hotel Saint Clair | Hotels | Travel | |
| Hyatt Centric Chicago Magnificent Mile | Hotels | Travel | |
| Hyatt House Chicago/Evanston | Hotels | Travel | |
| Omni Chicago Hotel | Hotels | Travel | |
| Peninsula Chicago | Hotels | Travel | Sustainable |
| Warwick Allerton Hotel Chicago | Hotels | Travel | |
| Fastenal Company | HVAC Maintenance and Repair | Maintenance Supplies (MRO) and Facilities Services |
|
| Neuco, Inc. | HVAC Maintenance and Repair | Maintenance Supplies (MRO) and Facilities Services | |
| North American | Janitorial Supplies | Maintenance Supplies (MRO) and Facilities Services |
Sustainable |
| Class Air 1 | Lab Equipment Maintenance | Laboratory | |
| Laboratory Builders, Inc. | Lab Furniture | Laboratory | Sustainable |
| Abcam Inc. | Laboratory Supplies | Laboratory |
|
| Affymetrix | Laboratory Supplies | Laboratory |
Sustainable |
| Anatomical Gift Association of Illinois | Laboratory Supplies | Laboratory | |
| Anatomic Gift Foundation Inc. d.b.a. Anatomy Gifts Registry | Laboratory Supplies | Laboratory | |
| BD Biosciences (Becton Dickinson & Company) | Laboratory Supplies | Laboratory |
Sustainable |
| Bio-Rad Laboratories | Laboratory Supplies | Laboratory |
Sustainable |
| Cell Signaling Technology | Laboratory Supplies | Laboratory |
Sustainable |
| DOT Scientific | Laboratory Supplies | Laboratory |
Sustainable |
| EMD Millipore | Laboratory Supplies | Laboratory |
|
| Fisher Scientific (primary preferred vendor for general lab supplies) | Laboratory Supplies | Laboratory |
Sustainable |
| Henry Schein | Laboratory Supplies | Laboratory |
|
| IDT | Laboratory Supplies | Laboratory |
Sustainable |
| Lonza Walkersville | Laboratory Supplies | Laboratory |
|
| Medical Education and Research Institute (MERI) | Laboratory Supplies | Laboratory | |
| New England BioLabs | Laboratory Supplies | Laboratory |
Sustainable |
| Promega Corporation | Laboratory Supplies | Laboratory |
Sustainable |
| Qiagen | Laboratory Supplies | Laboratory |
Sustainable |
| Rainin Instrument | Laboratory Supplies | Laboratory |
Sustainable |
| Sigma-Aldrich | Laboratory Supplies | Laboratory |
Sustainable |
| Takara Bio USA Inc (formerly Clontech Laboratories) | Laboratory Supplies | Laboratory |
|
| Thermo Fisher Scientific (formerly Life Technologies) | Laboratory Supplies | Laboratory |
Sustainable |
| C2 Imaging | Letterhead and Business Cards | Printing | |
| Arrow Messenger Service | Messenger Service | Mail and Shipping | Sustainable |
| Guy Brown LLC | Office Supplies | Office |
Sustainable |
| Reebie - On-Campus Moves | On Campus Moving Services | Office | |
| JC Licht | Paint and Painting Supplies | Maintenance Supplies (MRO) and Facilities Services |
|
| B&H Photo-Video | Photo and Video | IT and Electronics |
|
| Johnson Pipe & Supply | Plumbing Supplies | Maintenance Supplies (MRO) and Facilities Services |
|
| Amsive LLC | Print Firms | Printing | Sustainable |
| C2 Imaging | Print Firms | Printing | Sustainable |
| Cushing & Company | Print Firms | Printing | Sustainable |
| Dupli-Group | Print Firms | Printing | Sustainable |
| Graphic Arts Studio | Print Firms | Printing | Sustainable |
| Lake County Press | Print Firms | Printing | Sustainable |
| Marketing Communication Resource | Print Firms | Printing | Sustainable |
| Sunrise Hitek Group LLC | Print Firms | Printing | Sustainable |
| The Lane Press Inc. | Print Firms | Printing | Sustainable |
| 4imprint Inc. | Promotional Products | Office | |
| Club Colors LLC | Promotional Products | Office | |
| Corporate Imaging Concepts, LLC | Promotional Products | Office |
|
| Overture Promotions | Promotional Products | Office | |
| Reebie Storage & Moving (Allied Van Lines) - Relocation Moves | Relocation Services | Professional Services | |
| Wheaton - Bekins | Relocation Services | Professional Services | |
| University Police | Security Services | Professional Services | |
| Iron Mountain | Shredding/Document Destruction Services | Office | Sustainable |
| Cushing & Company (Supplemental Pre-Qualified Vendor) | Signs and Banners | Printing | Sustainable |
| FastSigns (Primary Preferred Vendor) | Signs and Banners | Printing | Sustainable |
| Graphics Arts Studio (Supplemental Pre-Qualified Vendor) | Signs and Banners | Printing | Sustainable |
| Lake County Press (Supplemental Pre-Qualified Vendor) | Signs and Banners | Printing | Sustainable |
| Sunrise Hitek Group LLC (Supplemental Pre-Qualified Vendor). | Signs and Banners | Printing | Sustainable |
| CDW-G (Software) | Software | IT and Electronics |
|
| Code 42 | Software | IT and Electronics | |
| Cvent | Software | IT and Electronics | |
| LinkedIn Learning (formerly Lynda.com) | Software | IT and Electronics | |
| REACH Media Network | Software | IT and Electronics | |
| Advanced Resources | Staffing Agencies | Professional Services | |
| Apex Life Sciences | Staffing Agencies | Professional Services | |
| Apex Systems Inc. | Staffing Agencies | Professional Services | |
| City Staffing | Staffing Agencies | Professional Services | |
| Insight Global | Staffing Agencies | Professional Services | |
| LaSalle Network | Staffing Agencies | Professional Services | |
| North Bridge Staffing Group | Staffing Agencies | Professional Services | |
| Populus Group | Staffing Agencies | Professional Services | |
| Swoon Technology Resources | Staffing Agencies | Professional Services | |
| WunderLand Group, an affiliate of Advanced Resources | Staffing Agencies | Professional Services | |
| Fastenal Company | Tools, Hardware, Miscellaneous | Maintenance Supplies (MRO) and Facilities Services |
|
| Multilingual Connections | Translation, Transcription & other language related services | Professional Services | |
| Charter/Bus Services | Transportation | Travel | |
| Enterprise Daily Rental Vehicles | Transportation | Travel | |
| Enterprise Fleet Vehicles | Transportation | Travel | |
| Lyft | Transportation | Travel | |
| Key Travel | Travel Agencies | Travel | |
| Travel 100 Group | Travel Agencies | Travel | |
| Ready Refresh (formerly Ice Mountain) | Water - Bottled and Filtration Units | Food Services | Sustainable |
| Clique Studios, LLC. | Website Design | Professional Services | |
| Digital Silk | Website Design | Professional Services | |
| Glantz Design | Website Design | Professional Services | |
| Neiger Design | Website Design | Professional Services | |
| OHO Interactive | Website Design | Professional Services | |
| Orbit Media | Website Design | Professional Services | |
| Velir Studios | Website Design | Professional Services | |