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Prosek Acquires Los Angeles-based Muirfield Partners

Mickey Mandelbaum Named Partner

Micky MandelbaumNEW YORK and LOS ANGELES, September 12, 2016 – Prosek Partners, a leading independent public relations and financial communications firm, has acquired Muirfield Partners, a Los Angeles-based strategic corporate and financial communications agency.  Mickey Mandelbaum, founder and president of Muirfield, will become a partner at Prosek, which has experienced organic revenue growth averaging 20 percent annually for the last three years. Terms of the deal were not disclosed.  

Muirfield Partners represents clients across multiple industries including asset management, private equity and hedge funds, investment banking, technology and real estate, and is the only West Coast agency to be included in Hedge Fund Alert’s ranking of top public relations firms.  The firm also represents clients in special situations such as litigation, financial restructurings, mergers and acquisitions, labor issues, high-level executive changes and other sensitive communications matters.

“Prosek has grown its West Coast client base substantially over the past several years,” said Jen Prosek, Managing Partner of Prosek Partners.  With the acquisition of Muirfield we not only establish a physical presence there, we also add to and strengthen our existing capabilities. Mickey is an experienced and respected advisor and has run one of the leading strategic financial communications firms on the West Coast for more than 15 years.  We are excited to welcome Mickey and his team to the agency.”

“I have great admiration for Jen and the firm that she and her team have built,” said Mandelbaum. “Prosek’s success is a testament to its strategic vision, creativity and talented team. Our two firms share similar values, culture and a strong commitment to fostering long-term relationships with our clients. We are excited to be an important part of Prosek's ongoing growth and believe this transaction will enhance our ability to serve the communications needs of our clients, who will benefit from expanded service offerings such as digital marketing, design and creative services.”  

Prior to founding Muirfield Partners in 2001, Mandelbaum was the general manager of the New York office of Connors Communications, a national technology and Internet public relations firm. Prior to that, he oversaw corporate communications and investor relations in the U.S. for Banco Santander, one of Europe’s largest banks with a growing presence in Latin America. Mandelbaum began his career in New York with Kekst and Company, a corporate and crisis communications firm. There he worked with numerous clients across a wide range of industries on situations ranging from litigation support to M&A. 

Mandelbaum earned a B.A. degree in English from Tufts University and a J.D. from Brooklyn Law School.

About Prosek Partners
Prosek Partners is among the largest independent public relations firms in the U.S. and one of the few domestic, mid-size firms that offers global capabilities through its London office and international network. Specializing in providing a full range of communications solutions to financial and professional services companies, the firm delivers an unexpected level of passion, creativity and marketing savvy. Prosek Partners’ “Unboxed Communications” approach brings breakthrough ideas to every client engagement. Services included digital and traditional media relations, financial communications, investor relations, transaction services, crisis communications and issues management, digital marketing, design and creative services, content creation, publishing, media training and branded entertainment. The firm has been named an Inc. 5000 Fastest-Growing Company for the seventh consecutive year, a “Top Place to Work in PR” by PR News, A New York Observer Power PR firm, and a Holmes Report Agency of the Year. Prosek Partners is a certified Woman-Owned Business. For more information about Prosek Partners visit or follow the agency on Twitter at

Janelle Joseph
212.279.3115 ext. 119