The Refrigerating Engineers and Technicians Association (RETA) will offer certification to refrigeration plant operators at the International Institute of Ammonia Refrigeration’s conference in Long Beach, CA, March 18-21. RETA certification is earned after passing a 15-question multiple-choice exam. For more information or to apply, contact the RETA office at 847-674-4738 or visit the website at www.reta.com.