
We partner with clients to structure and secure tailored financing solutions across commercial, healthcare, and specialty asset classes.

We partner with clients to structure and secure tailored financing solutions across commercial, healthcare, and specialty asset classes.
Capital Stack Advisors exists to empower clients with capital strategies that accelerate growth, optimize structures, and bring real estate visions to life.
Capital Stack Advisors exists to empower clients with capital strategies that accelerate growth, optimize structures, and bring real estate visions to life.
We are a boutique commercial mortgage banking and advisory firm specializing in customized debt and equity solutions. Our team brings strategic insight, financial rigor, and unmatched client service to every engagement, working collaboratively to simplify complex transactions.
Client-First Strategy – We begin with your goals and design financing around your success.
Integrated Expertise – From appraisal through underwriting, negotiation, and closing, we remain your trusted advisor.
Long-Term Relationships – We cultivate deep lender partnerships to expand your capital options


Shia Fishman is the CEO of Capital Stack Advisors, where he leads the firm’s strategic direction and advises clients on complex commercial real estate financing solutions, including senior debt, mezzanine financing, and structured capital. He works closely with sponsors and owners to deliver thoughtful, execution-driven capital strategies aligned with long-term objectives.

Alex joined Capital Stack Advisors in 2018 and is deeply involved in transaction execution from origination through post-closing. He has worked on financings ranging from $1 million to over $100 million across multiple asset classes, with a primary focus on HUD/FHA financing. Known for his hands-on approach, Alex works closely with third parties and municipal offices to keep transactions moving efficiently.

Simon Ruskin serves as the Operations Manager at Capital Stack Advisors, overseeing internal processes, systems, and operational workflows that support the firm’s advisory and transaction activities. He works closely with leadership to improve efficiency, ensure execution consistency, and support the delivery of high quality client service across all engagements.

Marc Kassai is a Managing Director with over 20 years of experience in commercial real estate and structured finance, having been involved in transactions with a volume exceeding $500 million. He advises on complex capital structures across bank, private, bridge, construction, and agency executions, including Fannie Mae, Freddie Mac, and CMBS programs. Marc brings deep expertise in multifamily, HUD-insured financing, and behavioral health and healthcare-adjacent real estate.