Executive Director of the Hong Kong Arts Festival (HKAF) since 2006, Tisa extended the scale and scope of HKAF programming to include large scale and site specific work, and increased annual turnover by 50%. From 2009, HKAF also produced and published commissioned original works, some subsequently touring outside Hong Kong. HKAF has consistently achieved over 95% attendance presenting about 140 performances of classic as well as contemporary works over five weeks in February and March each year.

Tisa is an Advisor for Arts Administration at the HK Arts Development Council; a member of the Performing Arts Committee of the West Kowloon Cultural District Authority. She has served as Board Member of The HK International Literary Festival and The Association of Asia and Pacific Arts Festivals. She currently serves on the Board of the International Society for Performing Arts, chairs the International Advisory Committee of the Tong Yeong Concert Hall, S Korea, and on the International Faculty of the Accademia Teatro alla Scala in Milan, Italy.