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Len Rus


410.900.1318  | 

Len Rus, CPA, is a fierce advocate for his clients. With 33+ years of public accounting experience, Len helps high net worth families and business owners with tax and accounting strategies.



Len loves to travel and has been all over the world. Most important lesson learned? Never drink the local drinks in Fiji.

Len Rus, CPA, wears a lot of hats at Gross Mendelsohn. He’s a firm partner, leader of the tax department and sought-after mentor amongst the firm’s staff.

Len has been working alongside high net worth families and privately-held businesses for 30+ years. Tax planning and preparation services, as well as business consulting and family office and administrative services, are just a few of the services Len offers to his clients.

Clients know Len as the person they call whenever they’re facing a tough accounting or tax issue. When asked what it’s like to work with Len, Emily Clark of The Three Amigos said, “Not every CPA would treat us the way Len treats us. We get great advice and quick responses from Len and his team — and not just at tax time.”

Len specializes in getting the next generation of high net worth families ready to take over the family business and wealth. Len prides himself on being a great listener, which comes in handy when he’s helping his family clients with the sometimes emotional aspects of transitioning wealth from one generation to the next. He also helps families manage their family office, including overseeing day-to-day details like banking, personal business services, etc.

At the firm, Len is known as a down-to-earth mentor and leader. One of Len’s passions is guiding staff members on how to succeed, both inside and outside the office.

Community service is important to Len. He serves as the treasurer of Beth Israel Congregation. He is also a member of Loyola’s John Early Society, composed of generations of alumni, faculty, administrators and staff who work to ensure Loyola’s continued advancement and reputation for the very best in education.


  • Master’s degree in taxation, University of Baltimore (1991)
  • Bachelor of arts degree in accounting, Loyola University Maryland (1986)


  • American Institute of CPAs
  • Baltimore Estate Planning Council
  • BKR International
  • Maryland Association of CPAs

More Fun Facts

  • On a Sunday night, when the house is quiet and his family has gone to bed, you’ll most likely find Len enjoying an episode of The Walking Dead.
  • Len believes one can never be too passionate about rooting for the Ravens and Terps.