Jim Postweiler
Executive Managing Director
Newmark
Chicago
Jim Postweiler’s commercial real estate career spans nearly four decades and reflects a rare combination of transactional excellence, Midwest-wide influence, and an unwavering commitment to integrity.
Postweiler began his career on the lending side of the business, spending a decade at Mutual of New York in roles that included loan production, asset management, and loan sales. That early experience gave him a deep understanding of capital structures, risk, and market cycles, knowledge that would later become a cornerstone of his brokerage career.
In 1997, Postweiler found his true calling when he joined Insignia ESG (formally Goldie Wolfe & Co.), where he transitioned into commercial real estate brokerage.
At Insignia, Postweiler quickly distinguished himself, rising to lead the firm’s Chicago office and Midwest sales platform. His reputation for executing complex transactions and building trusted client relationships followed him to JLL in 2004, where he served as managing director and co-head of the firm’s Chicago office capital markets group. At JLL, Postweiler specialized in office dispositions and recapitalizations, advising institutional and private clients through multiple market cycles.
In 2019, Postweiler joined Newmark, where he currently co-leads the firm’s Midwest Capital Markets Group from Chicago.
Postweiler has completed more than $15.5 billion in transactions involving over 100 million square feet of commercial real estate. But numbers alone do not tell the full story. Equally significant is his role as a mentor. Over the years, he has guided dozens of young professionals who have gone on to lead teams and firms responsible for many multiples of that transaction volume.
“Transactions have always held my interest, which is why I got into brokerage,” Postweiler said. “It is not for the thin-skinned, but it is where the action is.”
Recent representative work includes the sale of Park Place Village in Leawood, Kansas, a 10-building, approximately 485,000-square-foot mixed-use trophy campus that was fully occupied at the time of sale, executed by Postweiler and his team. The deal has been recognized as the largest multi-tenant office sale in the Midwest since 2022 completed without seller financing.
Additional notable transactions include the Jewelers Building at 35 E. Wacker (winner of “Deal of the Year” 2025 Greater Chicago Food Depository Real Estate Awards), Parkwood Crossing, a portfolio totaling more than 1.2 million square feet in Indianapolis; Keystone at the Crossing, a 1-million-square-foot portfolio successfully traded in a challenging market; Precedent Office Park and Regions Tower in Indianapolis; Tallgrass Corporate Center in Chicago; and the Pierre Laclede Center in Clayton, Missouri.
“There is no special sauce,” Postweiler said. “Winning in the long run is about working hard, being honest, delivering results, and treating people with respect.”
Beyond brokerage, Postweiler has been a longtime council member and contributor to the Urban Land Institute and a regular participant in NAIOP. His philanthropic efforts include ongoing involvement with the Harold Eisenberg Foundation, the American Cancer Society, the American Red Cross, and Feed America.
