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Our Leadership and Staff

Daniela and Thomas Mertz

Daniela and Thomas have been a husband and wife ministry team for 21 years. Thomas currently serves as the dean of the Bay Area congregations. They have three boys aged 19 - 21.


Chun Zhang

Chun Zhang is a graduate of Waterloo Lutheran Seminary. Rev. Zhang is married to Dr. Christine Han, Assistant Professor at Laurier University in Brantford. They have 2 children, Sophie (5) and Jasper (3). Pastor Zhang is presently enrolled in the PhD Program with a focus on "mission" at Waterloo Lutheran Seminary.




Our church secretary is Carol-Ann Koevoets.  Carol-Ann and her husband have three children and have been members of St. John's since 1995.  She holds a degree in Sociology  from Redeemer University College. Carol-Ann is in the office Monday-Friday from 9-3.  Summer hours are Wednesday-Friday 9-1.

Heide Lang

Heide Lang lives in Waterdown and is a proud mother to her 2 children, Tessa (21) and Jasmin (19). 
Our new music worship leader has taught with the Halton District School Board for 34 years.
She is the director of the Halton Regional Police Chorus and has been with them for over 20 years.
As well, Heide is the music director for the Oakville Army Cadet Ceremonial Band which formed in 2012.
She also runs her own global marketing and leadership business.
Heide is very happy to be returning to the church which she grew up in and was confirmed in, after being a supply organist in various churches in the area for the past 4 years, and looks forward to enriching the church family through her musical leadership.