Meet the Team

Meet the members behind DeMartini & Company. We are here to help you succeed!


Christian DeMartini

Christian DeMartini joined De Martini & Company, LLP in December 2011, bringing with him four years of business experience ranging from accounting assistant and tax preparation to sales. Born and raised in the Bay Area, Christian received his Bachelors degree in Business Administration with an emphasis in Finance from Regis University.


Rumi Radeva

Rumi Radeva joined De Martini & Company, LLP in January 2012. She brings seven years of accounting and tax experience with international and US companies. Rumi, born and raised in Bulgaria, was educated abroad and has a Bachelor and Masters in Business Administration with a concentration in Finance and Economics. She is a certified Enrolled Agent and is currently studying for the California CPA exam. Her specialties include taxation of individuals and partnerships as well as auditing. In her free time, she enjoys the outdoors and being with her husband.

Office Manager

Louanna Himenes

Louanna Himenes has been with De Martini & Company, LLP since December, 2018. Lou as she prefers to be called, brings many years of experience in Office Management and Human Resources, from retail, cable to construction management companies. Besides running a positive office, she specializes in organizing and researching to find a win/win solution. Lou was raised in Fife, Washington and moved to California with her husband. She adores her two grandsons, working outdoors and has chaired many fundraisers to help the community while being a current member of the San Mateo Lions club since 2016.


Stephen J. De Martini

Stephen J. De Martini is the principal of De Martini & Company, LLP which purchased the practice of Baldanzi & Company in 2010. Prior to the purchase, Stephen held CEO and CFO positions in a number of companies and was associated with both a regional and a national CPA firm for more than 25 years. As a partner in the regional accounting firm for over 14 years, his duties included tax planning for corporate, partnership and individual clients, as well as heading the Audit / Review Department for more than 12 year. With over 35 years of experience as a CPA, Stephen's areas of expertise include individual, corporate and partnership taxation, and auditing. He graduated from Santa Clara University with a Bachelor of Commerce in Accounting.