The American Council of IT Sourcing and Procurement Executives (ACSPE) was founded in 2013 and the American Council for Diversity and Inclusion (ACDIP) started in Jan 2021. Michael Shaw is the founder of both. Access via LinkedIn.

The American Purchasing Society was the first organization to establish a certification program for buyers and purchasing professionals and they now offer five certification programs. Excellent reports, surveys and tools are offered as well.

APQC, since 1977, is a nonprofit organization that provides business benchmarking and best practices research. The Supply Chain Management membership provides access to benchmark data, best practices, case studies, and tools.

The Association for Supply Chain Management (ASCM) focuses on supply chain organizational transformation, innovation and leadership. ASCM is built on a foundation of APICS certification, including CPIM, CSCP, and CLTD.

APTAC is for DLA-funded (Defense Logistics Agency) Procurement Technical Assistance Programs (PTACs). The organization provides important information, professional networking, and comprehensive training opportunities. 

The Blockchain In Transport Alliance's (BiTA) members are mostly from the freight, transportation, and logistics industries. BiTA develops industry standards, educates members and others on blockchain applications/solutions.

This Council offers the industry’s first certification program for buyers of legal services: Certificate Fundamentals Legal Procurement. An impressive collection of useful resources can be found in the Toolbox, including their market intel report.

CAPS (Center for Advanced Procurement Strategy) is a B2B nonprofit research center shaping the future of supply management with focused primary research, benchmarking and best practices, and exclusive executive events.

CASME corporate members are hands-on category and sourcing managers. Membership offers access to best practice sourcing insights and an extensive archive of procurement guides, benchmarking data, events and peer networking. 

The Association of Technology Acquisition Professionals – CAUCUS - offers an Education Center, Resource Library, and Vendor Free Discussion Forum and Online (Live) meetings. Certification programs include CPTE)  and CTPS.

The CBSCA  - Canadian Supply Chain Blockchain Association - provides a global platform to develop the Canadian Data Standards, promotes industry acceptance and to drive the adoption of  emerging technology forward.

The Chartered Institute of Logistics and Transport (CILT) supports the professionals who plan the roads, drive the trucks, bring in the raw materials, and store the goods safely; a voice for supply chain, logistics and transport.

As an influential professional body, the Chartered Institute of Procurement & Supply (CIPS) offers various qualifications to support professional development. Check CIPS Knowledge for procurement topics/skills, commodities/categories, and tools .

The Coalition for Government Procurement is a voice for commercial service and product companies selling in the federal market. Members have access to the latest federal compliance and policy information. 

Core (Canada) advances the knowledge and capabilities of managing sourcing and service arrangements, including Everything as a service. CORE offers AOP certification. Members have access to Forums the Research Centre.

The Council of Supply Chain Management Professionals (CSCMP) is a prolific publisher and offers hot topic publications, education, networking, research. SCPro is the three-level certification program offered by CSCMP.

The Foundation for Supply Chain Solutions (F4SS) is a non-profit organization representing the food, beverage and personal care industry and customers that use external contract manufacturing. Check out industry tools.

The Global Sourcing Association (UK), started 30 years ago and currently has corporate members that represent buyers, suppliers and support service companies. The Knowledge Centre offers research and the Global Sourcing Standard.

The Global Women Procurement Professionals (GWPP) provides an information exchange, discussion forum, and a voice for all women involved in the professions of procurement, sourcing and supply chain. 

IAOP is for those working in outsourcing and brings together individuals and organizations from the provider, advisor and buy-side community and provides the tools, resources and connections needed to succeed in today's environment.

Candidates, to attain full professional membership to the International Institute for Advanced Purchasing & Supply (IIAPS), must complete the Green, Red, and Black Belts. Measurement tools include The ICA Index and PSCM Index.

Founded in 1915, the highly influential Institute for Supply Management (ISM) provides the  respected ISM Report on Business and offers two certification programs, CPSM and CPSD, in addition to the ISM Mastery Model.

MHI is the nation's largest material handling, logistics and supply chain association. Members include material handling and logistics equipment companies, systems and software manufacturers and integrators; consultants; and 3PL providers. 

Started in the 1920's, National Association of Educational Procurement (NAEP) serves higher education purchasing officers. There is an RFP library and publications include Educational Procurement Journal and NAEP Pulse.

NASPO is made up of the directors of the central purchasing offices in each of the 50 states. NASPO was a founding partner of the Universal Public Procurement Certification Council (UPPCC), which awards the CPPO and CPPB designations. 

The National Contract Management Association (NCMA) is for those in the field of contract management and is publisher of Contract Management magazine, and Journal of Contract Management. Certifications include CPCM, CFCM, and CCCM. 

The NIGP, Institute for Public Procurement, supports the public procurement profession. Government Procurement is a leading resource for the public procurement community. NIGP offers the Certified Procurement Professional Certification program.

NLPA (Next Level Purchasing Association) was founded by Charles Dominick in 2000 and provides the SPSM, SPSM2, SPSM3, and SPSM Level 4 certifications. The NLPA Library contains tools, templates, scorecards, checklists, and reports.

Procurement and Supply Institute of Asia delivers world-class training, certifications, conferences & events, research, membership, and corporate partnerships. PASIA is a certification partner of APICS (now ASCM).

Sedex (Supplier Ethical Data Exchange) is dedicated to driving improvements in ethical business practices in global supply chains. For buyers, their tools like SMETA and Radar, make it simple to collect data from suppliers about site conditions. 

SIG (Sourcing Industry Group), founded in 1991, provides thought leadership and networking opportunities to executives. SIG is known for SIG Global Summits, SIGnature Events, and SIG University. Future of Sourcing is key pub. 

The Sustainable Purchasing Leadership Council (SPLC) develops programs that standardize sustainable purchasing efforts. Look for Supplier Sustainability Ratings and Guidance for Leadership in Sustainable Purchasing handbook.

The Sustainable Procurement Pledge (SPP) is an international non-profit organization for procurement professionals, academics and practitioners, driving awareness on responsible sourcing practices and empowering people in procurement.

The Universal Public Procurement Certification Council (UPPCC) is an independent entity formed to govern the Certified Public Procurement Officer (CPPO) and Certified Professional Public Buyer (CPPB) certification programs. 

World Commerce and Contracting, formerly IACCM, provides advisory, research, publications and training for contracts, commercial and relationship management professionals. Certification programs offered are CCM and SRM.