Management Team

Sherman Hsieh

Founder and CEO

Sherman Hsieh is founder and CEO of Gate58 Marketing. Prior to founding Gate58 Marketing, Sherman was a marketing executive with Siebel Systems. During his nine year tenure he oversaw the web marketing strategy, execution, and operations as well as online lead generation. His group's online lead generation programs delivered over $3 Billion in sales pipeline during Sherman's tenure at Siebel. Sherman was named the Top Lead Generator at Siebel and a member of the Siebel Founder's Circle (highest professional distinction at Siebel). He has also held marketing and engineering positions with Oracle Corporation and Intelsat. Sherman graduated from UC Berkeley where he studied computer science and economics.

Anthony Castellino

Chief Customer Officer

Anthony Castellino has 18 years of experience in global technology sales, marketing and sales management with publicly traded enterprise software companies. As Chief Customer Officer at Gate58, Anthony is responsible for the company's world-wide sales efforts, strategic planning and customer satisfaction.

A seasoned sales and marketing executive, Anthony spent seven years with Siebel Systems where he ran the company's $500M global maintenance renewals division. As an executive in demand generation, Anthony built and managed the inbound and outbound sales development call centers globally. Generating over a billion dollars in sales pipeline revenue, Anthony was awarded the CEO Circle and President’s Circle awards. Prior to Siebel, Anthony managed Oracle's direct response/lead generation division. Anthony holds a Bachelor of Science Degree in Biology from Colby Sawyer College.

Philamn Lau

Vice President of Technology

Philamn Lau is Vice President of Technology at Gate58 Marketing.  He directs all engineering and technical integration and operation activities. Prior to Gate58, Philamn served as a lead architect at TransUnion Interactive where he was responsible for leading development and technical strategy efforts for Bank of America’s online banking marketing engine, which serviced 6M users daily.  Philamn also held engineering positions with and Giant Step (now Arc Worldwide).  Philamn holds a bachelor’s degree from Washington University in St. Louis where he majored in computer science.