Mark Hentemann


Mark Hentemann has been investing in multifamily since 2000, building a personal portfolio of 14 Los Angeles apartment buildings. After honing his skills for a decade, achieving success in both good markets and bad, Mark started Quantum Capital RE, and is its principal. He has completed 50+ value-add multifamily investments, remaining passionate about it as a superior investment. His mission is to share his knowledge and help friends and like-minded investors achieve their goals. He’s also an Emmy Award nominated writer/producer who has written for David Letterman, Family Guy, and created shows for Fox and MTV. He lives in Los Angeles with this wife, Lynne, and their three daughters.

Lee Ripma


Lee Ripma is a California native who invests out-of-state, primarily in Kansas City, MO. She has a growing portfolio of multifamily assets, and has completed several major rehabs. She is Quantum Capital’s Asset Manager, overseeing the existing portfolio and assisting with acquisitions. Lee is also a professional biologist. Lee lives in Los Angeles with her wife, Jamie.

Nicholas Ameluxen

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Nick is a partner at Quantum Capital, assisting in acquisitions, investor relations, and asset management. Through his 11 years in leadership roles Nick has found success by solving big problems through relentless hard work and ingenuity. He has been an active real estate investor in Austin since 2015, and oversees Quantum Capital’s portfolio in Austin, TX. While originally from Denver, Nick moved to Austin in 2014 with his wife and two children.

TDI Property Management

Tzvi Fuerst and Danny Levin oversee property management for Quantum Capital as partners in TDI Properties. They have been in the Los Angeles property management business for over 25 years.

First Pacific Financial

Todd Sherman and Garrett Broom oversee financing for Quantum Capital. They have over thirty years’ experience in multifamily acquisitions and refinances.

Singer Burke

Singer Burke has been an advisor to Quantum Capital since its founding, performing financial analysis and accounting services. Their team includes Matthew Burke, Aaron Zimmer and Elaina Kogan.

Engineered Tax Services

Engineered Tax Services, based in Charlotte, NC, performs advanced tax services for Quantum Capital, including cost segregation studies.