Press Room

January 03, 2012

WTAS Promotes Three Managers in San Francisco

Three Managers were recently promoted to Director in the San Francisco office of WTAS. The internal promotes included Stephen deHaan and Mamie Chew who both are members of the firm’s private client services practice and Kelly Ackel who is a member of the firm’s valuation team.

“The addition of Steve, Mamie and Kelly to our team of Directors demonstrates how WTAS recognizes and values professionals who are devoted to their careers and clients. These three individuals possess the experience, capabilities and leadership necessary to drive growth in our San Francisco office,” said Frank Cassidy, the firm’s Office Managing Director for San Francisco. 

Combined, these Directors bring nearly 25 years of experience to the firm. DeHaan’s experience includes implementing estate, gift and income tax strategies for complex ultra high net worth family groups and individuals, executives at early-stage companies and closely-held businesses. Chew works primarily with high net worth family groups and individuals, with a specialization in pre-divorce forensic accounting, domestic couples, stock option planning for individuals at start-ups, agribusiness and estate planning. Ackel is an Accredited Senior Appraiser (ASA) in business valuation who has experience with the valuation of closely-held businesses, business interests, intangible assets, intellectual property, debt instruments and derivatives.

“As a firm, we continually monitor and cater to the needs of the market we serve. These new Directors embody our dedication to outstanding client service and our commitment to the ongoing success of our practice in San Francisco,” commented WTAS CEO, Mark Vorsatz.

DeHaan, Chew and Ackel account for three of a total of eight promotions to Director across the firm’s 14 offices.

For additional information about Stephen deHaan, Mamie Chew, Kelly Ackel or WTAS, contact Megan Williams or visit

About WTAS
WTAS LLC is one of the largest independent tax firms in the United States, providing a wide range of tax, valuation, financial advisory and related consulting services to individual and corporate clients across the country. The firm is comprised of over 500 personnel located in 14 major cities and encompasses top advisors with previous experience in the international accounting firms, law firms, IRS and state taxing authorities. Our advisors hold multiple professional credentials and have depth in a wide range of capabilities allowing us to provide clients with comprehensive, integrated solutions.

WTAS has offices serving Baltimore, Boston, Chicago, Greenwich, Harrisburg, Los Angeles, New Jersey, New York City, Palo Alto, Philadelphia, San Francisco, Seattle, Washington, D.C. and West Palm Beach.