The Rev. Dr.  Heather Vais was inducted into the Ministry Team at Thornhill Presbyterian Church in June 2007. 

The Rev. Dr. Heather J. Vais

Heather has been practicing ministry for 26 years serving in rural, downtown and suburban settings. While her passion is for ministry in the church, Heather has also taught a modular course in communication at Tyndale University. Her service to the broader church includes positions on boards and committees of the denomination, as well as serving as the moderator of the Presbytery of Oak Ridges and the chair of the Business Committee. Heather also spent many years as a member of the Board of Governors for Knox College as the chair of the Multiculturalism committee and on the executive. In May 2017 Heather received her degree of Doctor of Ministry from Knox College and University of Toronto. The title of her dissertation is Beyond Cordiality: Interpreting Practices of Mutual Hospitality toward Building Intercultural Competence at Thornhill Presbyterian Church.

In her spare time Heather enjoys cycling (particularly in preparation for The Enbridge Ride to Conquer Cancer), long walks with the dog, photography, reading, and time spent at the cottage with family. Heather has a B.A. in English and Philosophy from the Western University and a Master of Divinity degree from Knox College at the University of Toronto, and a doctoral degree from Knox College and the University of Toronto. You can reach Rev. Heather directly at   or 905-889-5391

Heather has two children, Brett and Elizabeth, one adorable dog and two playful cats.

Stephanie Vandermey – Office Administrator  Stephanie enjoys her position at TPC as Office Administrator and has been here since July 2005. She is part of our choir and spends her off time creating something from nothing using various mediums with her love of crafting.  Steph loves photography as well and when she’s able, loves to be at their Muskoka home away from home in Gravenhurst that she and her husband are renovating for use as a retirement home. She has three children, Steven , Jenna , and Eric and two grand babies which she adores!  You can reach Stephanie directly at or 905-889-5391



maria_2Maria Lim – Organist and Choir Director

Maria Lim is a professional musician as organist, choir director, recitalist, accompanist and piano pedagogue. The highlights of Maria’s career are her pipe organ performances at the Sydney Town Hall in Australia and the prestigious Lincoln Center in New York City; St. Bartholomew’s Church in Manhattan; and Cathedral Church of St. James , Metropolitan United Church and Yorkminster Park Baptist Church in Toronto. She also represented the Philippines as a featured soloist at the Second International Bamboo Organ Festival sponsored by the Royal Belgian Embassy, the German Cultural Center and the Cultural Center of the Philippines. Maria received her Master of Church Music (Organ Major) from Golden Baptist Theological Seminary in Mill Valley, California. Since February 1989, Maria has held the position as Director of Music Ministry (Organist and Choir Director) at Thornhill Presbyterian Church (Ontario, Canada).

Maria is married to Milton and they have two daughters, Amy and Heidi. She also volunteers as a spiritual caregiver at York Central Hospital. She may be contacted by phone at 905-508-7913 or e-mail at