Shooting hoops and “net-working” have enabled Jason Greenstone’s career to blossom.

The 27-year-old associate in Cushman & Wakefield’s Retail Services Group was recently chosen as the Real Estate Board of New York’s Most Promising Commercial Salesperson of the Year — informally known as “Rookie of the Year.”

“He is one of the great all around guys and is very disciplined, very giving and has a good heart,” says Gene Spiegelman, vice chairman retail services at Cushman & Wakefield, of his young associate.

Last year, Greenstone worked on over 31 lease transactions in Manhattan and other markets. These included Mighty Quinn’s BBQ at 75 Greenwich St. and Angel Pad’s at 78 Fifth Ave.

He is also an integral part of the team representing Related Cos. and TIAA-CREF at the MiMa project on W. 42nd St., where a farm-to-table market and restaurant, Treehaus, will open before the year’s end.

Greenstone is also vice president and sits on the executive board of The Pink Agenda.

“My mother is a survivor,” said Greenstone of the breast cancer charity. “It affects one of four women and Cushman & Wakefield has allowed me the flexibility to expand this charity.”

Few people grow up thinking they are going to be a real estate broker and Greenstone was no different. But as a freshman at Lehigh University he took its unique class in integrated real estate.

As part of the program, another Lehigh grad, Tara Stacom, vice chairman of Cushman & Wakefield, had endowed the Stacom Family ire@l Speaker Series. Its first speaker was New York real estate executive Barry Gosin, chairman of Newmark Grubb Knight Frank, who discussed his then under development $800 million Sands Casino in Bethlehem, Penn. After listening to the speech, Greenstone wasn’t really sure what Gosin did, “But it sounded good.”

After graduation, Greenstone listed apartments and joined the residential team run by Rafael De Niro. But Greenstone realized he preferred commercial real estate. While playing weekly basketball games, he met several commercial brokers. He worked at CBRE before joining Cushman & Wakefield’s Retail Services Group in July 2012.