- American Society of Safety Engineers. (Signed December 4, 2002).
- Coordinating Committee for Automotive Repair. (Signed February 17, 2004).
- National Association of Landscape Professionals (formerly Professional Landcare Network). (Signed October 2, 2008).
- National Safety Council. (Signed September 9, 2003).
- Restaurant Opportunities Centers - United. (Signed October 20, 2011).
- United States Institute for Theatre Technology (USITT) the and International Alliance of the Theatrical Stage Employees, Moving Picture Technicians, Artists and Allied Crafts of the United States, its Territories and Canada, AFL-CIO, CLC (IATSE). (Signed July 16, 2013).