Mr. Landman is a co-founding and controlling member of MainLine Investment Partners and directs all investment, management and strategic initiatives of the organization. In addition, he is a co-founding and controlling member of Merion Realty Partners. Comprised of a family of businesses, MainLine Investment Partners is involved in the control, operation and/or ownership of MainLine Private Wealth, LLC, MainLine Investment Advisers, LLC and MainLine Securities LLC. Mr. Landman has also been a principal and Senior Managing Director of CMS Companies for over 30 years (since 1987), and during this period has been responsible for the investment strategy of over $2 billion in private equity and real estate capital. He is also a senior advisor at Renovus Capital, an education-oriented SBIC, is a principal and manager of Merion Residential, a real-estate management company, and directs various corporate investments for MainLine Investment Partners. He serves on numerous boards of private equity firms and portfolio companies associated with MainLine or CMS investments, including Zeta Global Holdings Corp. (publicly traded on NYSE). Mr. Landman also serves as an Emeritus Trustee of the Thomas Jefferson University Board of Trustees.

Prior to joining CMS, Mr. Landman was a partner in Reich & Landman with offices in Pittsburgh, PA and Sarasota, FL, with expertise in transactional corporate practices and the representation of professional athletes. Mr. Landman holds a Bachelor of Arts degree from the University of Pittsburgh and a Juris Doctor from the University of Pittsburgh School of Law.


Mr. Clapper is a co-founding principal of MainLine Investment Partners, LLC and spends the majority of his time identifying, performing due diligence on, and managing investments in operating businesses and real estate assets. Mr. Clapper serves as an executive officer for MainLine Investment Partners and most each of its companies, and assists Mr. Landman in directing investment, management, and strategic initiatives for the entire organization. He is currently serving as President of Ethos Cannabis. Mr. Clapper has also been an executive officer of CMS Companies since 2008, beginning his tenure as controller and chief financial officer and later becoming a principal. Mr. Clapper has also been serving on the board of education at the Haddon Heights School District in Camden County, New Jersey since 2019.

Prior to joining CMS, Mr. Clapper was a senior manager with Ernst & Young LLP’s assurance and advisory practice where he served the firm’s Philadelphia and New York real estate, private equity, hedge fund, banking and investment advisory clients. He was also an adjunct professor at Drexel University. Mr. Clapper holds a Bachelor of Science degree from Drexel University, where he graduated Summa Cum Laude.

William J. Romanelli | Chief Financial Officer

Mr. Romanelli serves as chief financial officer of MainLine Investment Partners, LLC. He is also CFO and executive officer of various related businesses, including MainLine Private Wealth, LLC and MainLine Securities, a registered broker-dealer. Mr. Romanelli manages the corporate financial team of MainLine Investment Partners and CMS, and also focuses on various corporate investments for MainLine Investment Partners.

Prior to joining MainLine, Mr. Romanelli spent three years at Intertrust USA, LLC in Wilmington, Delaware as finance director and chief financial officer, and prior to that five years as Controller, at Graham Partners, Inc. in Newtown Square, Pennsylvania. Mr. Romanelli is a member of the American and Pennsylvania Institutes of Certified Public Accountants and holds his CPA license in the Commonwealth of Pennsylvania. He holds a Bachelor of Science degree from Widener University.

Alex Chadwick | Vice President, Private Equity

Mr. Chadwick serves as Vice President, Private Equity at MainLine Investment Partners, LLC. Mr. Chadwick focuses on various corporate investments for MainLine Investment Partners. His responsibilities include sourcing and execution of new investments and portfolio management. He is also currently serving as Chief of Staff and Vice President of Strategic Development at Ethos Cannabis.

Previously, Mr. Chadwick was an associate with Harris Williams & Co., a middle-market investment bank, where he focused on mergers and acquisitions and multiple industry verticals, including business services and industrials. Mr. Chadwick graduated with a Bachelors of Business Administration and honors in finance from the Goizueta Business School at Emory University.

Matthew Hopper | Controller

Mr. Hopper serves as the Controller for MainLine Investment Partners, LLC. Mr. Hopper’s responsibilities include the oversight and management of quarterly and annual fund financial reporting and administration as well as the oversight of fund-level cash flows. Additionally, Mr. Hopper assists with fund-level regulatory reporting and compliance.

For eight years prior to joining MainLine, Mr. Hopper held various accounting management positions at KPMG LLP, most recently as a Senior Manager in the firm’s Audit practice, where he focused on real estate and private equity funds and advisors. Mr. Hooper obtained his Bachelors of Business Administration and Masters of Science in Accounting from Southern Methodist University. Mr. Hopper is a Certified Public Accountant.

Donna Rittershausen | Compliance Officer

Ms. Rittershausen handles compliance and corporate governance at MainLine Investment Partners. Ms. Rittershausen has been working in the financial services industry for 35 years and has specialized in SEC and FINRA regulatory compliance for the last 25 years. She has been at CMS Companies in various capacities since 1993 and is currently an officer at MainLine Investment Partners, focusing on compliance and special projects. She holds various FINRA licenses and is a registered securities principal and principal manager at MainLine Securities, a registered broker-dealer, and serves as chief compliance officer for MainLine Securities, MainLine Private Wealth, MainLine Investment Advisers and CMS Fund Advisers.

Prior to joining CMS, Ms. Rittershausen worked for five years as a sales assistant for institutional money manager, Newbold’s Asset Management in Bryn Mawr, Pennsylvania.

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