Boomsma runs Leading Real Estate Companies of the World (LeadingRE), one of the nation’s most influential brokerage networks with more than 550 firms and some 134,000 agents in over 70 countries. The invitation-only organization counts many of the nation’s largest brokerages as members. They network and share best practices and referrals with each other. Boomsma started at LeadingRE in 2005, creating its Luxury Property International, which he led until becoming brokerage network CEO in 2018.