Our Team


Mark Renbaum


Mark Renbaum joined Schwaber Holdings in 2011 as Chief Executive Officer. Mr. Renbaum concentrates on formulating and executing the firm’s long-term real estate strategy and overseeing all acquisition, development, and asset management functions. Since joining Schwaber Holdings, Mr. Renbaum has systematically upgraded the entire Schwaber portfolio; completing expansions at Yorkridge Shopping Center (2017) and Gittings Marketplace (2014); completing the redevelopment of Pikes Village (2015) and Cold Spring Center (2014); and has initiated development projects at Pulaski Crossing (residential) and The Alameda (mixed-use, senior housing).

Mr. Renbaum brings more than 20 years of comprehensive commercial and retail real estate experience to the company, having also served as Retail Developer for St. John Properties, Director of Development for Black Oak Associates, and as an Asset Manager at Greenberg Gibbons Commercial Corporation. Mr. Renbaum earned his Bachelor of Business Administration from Emory University, his Juris Doctor and Masters in Business Administration from the University of Baltimore, and attended The Johns Hopkins Carey Business School (Master of Science in Real Estate). Mr. Renbaum is an active member of the International Council of Shopping Centers and serves on the Board of Directors of the Dr. Michael Feinglass Cancer Foundation, the Jewish Community Center of Baltimore, THE ASSOCIATED’S Real Estate Industry Group, and co-Chairs THE ASSOCIATED’S Real Estate Committee. Mr. Renbaum is often a guest speaker at various panels and a guest lecturer at Georgetown University.

Rick Wagonheim

Principal and Board Member

The youngest grandchild to company founder, Milton Schwaber, Rick brings more than three decades of experience in the visual effects film production industry to Schwaber Holdings. Prior to joining Schwaber Holdings’ board in 2004, Rick was a Principal and Executive Producer at the ad industry’s leading visual effects studios, collaborating with a variety of directors and digital artists on complex productions for blue-chip brands including Mercedes-Benz, Cadillac, Coca-Cola and HBO’s Emmy award-winning series, “The Sopranos” and “Sex and the City.”

As a former Managing Director, Executive Producer and rainmaker, these diverse management, production, and marketing experiences gives Rick a keen feel for a host of items he’s involved with at Schwaber, including operating budgets and financial issues, working with the company’s accounting team and overseeing Schwaber’s social media marketing, to name a few. Rick’s problem-solving acumen for complicated film production issues extends organically to solution-seeking challenges in commercial real estate enabling him to cut through the clutter.

Jeffery Gaber

Principal and Board Member

Dr. Jeffrey Gaber brings more than 35 years of experience in management, administration, and entrepreneurship to Schwaber Holdings.  Dr. Gaber joined the Board of Schwaber Holdings in 2004, carrying on the legacy of his grandfather, Milton Schwaber.  Born and raised in Baltimore, Dr. Gaber is a graduate of The Park School, Emory University, and University of Maryland Medical School.  He has a private practice in Internal Medicine, is a Fellow of the American College of Physicians, a member of the Alpha Omega Alpha Medical honors society, and Assistant Professor of Medicine at the University of Maryland Medical School. In Dr. Gaber’s spare time he enjoys photography, golfing and playing the drums.

Bob Ercole

Board Member

Robert Ercole is a principal with Neuberger, Quinn, Gielen, Rubin & Gibber, P.A. He is a tax and corporate attorney who advises companies and individuals on matters ranging from sophisticated business and tax planning, mergers and acquisitions to complex commercial real estate sales, acquisitions, joint ventures, and financings.  Mr. Ercole joined the Schwaber Holdings Board of Directors in 2017, following the passing of third generation Principal, Mark Wagonheim.  In addition to holding a Juris Doctorate degree from the University of Maryland, Mr. Ercole is a Certified Public Accountant (CPA) and a graduate of the University of Pennsylvania Wharton Business School.


Joel Kaye

Strategic Financial Consultant

Former Director of Ellin & Tucker, Chartered, one of the largest accounting firms in Baltimore, with more than 40 years of experience specializing in management advisory services to many of the firm’s major clients. The breadth of experience includes real estate, golf course operations, printing, wholesale distribution, manufacturing, automotive, oil and gas, and professional service organizations.

Principally provided corporate consulting in the areas of mergers and acquisitions, divestiture planning, equity, and debt structuring or restructuring, cost accounting, financial modeling, and forecasting.

Lead Partner in many of the firm’s buy-side and sell-side due diligence engagements. Qualified as an expert in both Federal and State court in the areas of bankruptcy, insolvency, and loss profit matters. Provided credit support and evaluation services to regional banking institutions, represented debtors, unsecured and secured creditors and advised companies in financially troubled situations and bankruptcies. Has taken the main role in many of the firm’s forensic engagements involving embezzlement and bank fraud and is certified in financial forensics (CFF).



Chris Peters

Director of Construction and Property Management

Chris Peters joined the property management team at Schwaber Holdings in 2012. Chris brings with him nearly twenty years of commercial construction experience. He founded his commercial general contracting company, Peters Contracting, Inc. in 2004. Prior to that, he performed facilities maintenance in Carroll and Baltimore counties. Chris is a 2001 graduate of New England College with a Bachelor’s degree in environmental science. In his spare time, Chris enjoys spending time with his wife, Laura, and his two children, Bronson and Lolah, as well as playing lacrosse, being outdoors, traveling with his wife, and watching college lacrosse and Ravens games.

Chris Swartz

Project Manager

Chris’s primary role is oversight of the property maintenance for all of the properties in the Schwaber portfolio, and coordinating any subcontractors and vendors. He lives in Pennsylvania and enjoys woodworking, playing the harmonica, all Maryland Sports, and spending time with wife, Kristen, and daughter, Eilee. He is looking forward to meeting his son, Jude, in early June of 2019.

Jane Rose

Principal and Board Member

Rhonda Seibert

Office Manager