Schnackel Engineers holds memberships with the following organizations:
- American Institute of Architects (AIA)
- American National Standards Institute (ANSI)
- American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE)
- Build it Green – GreenPoint Rated System
- Building Industry Consulting Service International (BICSI)
- Carbon Leadership Forum (CLF – Omaha)
- Codes Canada
- Energy Star Rating Program
- Energy Star Portfolio Manager
- Illuminating Engineering Society (IES)
- Institute of Electrical and Electronics Engineers (IEEE)
- International Association of Plumbing and Mechanical Officials (IAPMO)
- International Code Council (ICC )
- International Council of Shopping Centers (ICSC )
- International Organization for Standardization (ISO)
- National Electrical Contractors Association (NECA)
- National Electrical Manufacturers Association (NEMA)
- National Fire Protection Association (NFPA)
- Underwriters Laboratories (UL)
- U.S. Green Building Council (USGBC)