SL Green Realty Corp., the largest commercial landlord in New York, has promoted Harrison Sitomer to president. The announcement was made Monday, naming Sitomer, 36, as second-in-command to CEO and chairman Marc Holliday at the $2.6 billion real estate investment trust (REIT).
“Harry exemplifies the dedication, tenacity and strength that define SL Green,” Holliday said in a statement. “This promotion reflects his achievements and our continued commitment to growing talent from within.”
Sitomer will continue to serve as chief investment officer, a position he has held since 2022. His promotion formalizes an expanded role at SL Green, where he began his career as an intern in 2011 after graduating from the University of Pennsylvania.
He advanced through the company’s investment division and took on greater responsibility following the departures of co-chief investment officers Isaac Zion in 2020 and David Schonbraun less than a year later. As CIO, Sitomer managed key transactions such as SL Green’s acquisition of 245 Park Avenue out of bankruptcy and its $445 million purchase of 450 Park Avenue—its first major acquisition in four years.
In addition to overseeing these deals, Sitomer played a significant part in building SL Green’s $1.3 billion debt fund and expanding its asset management business. These responsibilities are typically associated with the role of president.
The company had not named an official president since Andrew Mathias left at the end of 2024 after 25 years with SL Green—a decision viewed by many as part of broader cost-cutting efforts following financial challenges brought on by the pandemic and increased remote work.
Now, Sitomer will be responsible for supervising $2.5 billion in planned asset sales and further developing SL Green’s management business. His appointment positions him as a potential successor to Holliday should there be future leadership changes.
Holliday also commented on Sitomer’s progression within the firm: “His entire career has been shaped here, and his commitment to our culture, our stakeholders and our city is unwavering,” he said.
