Meet the key members of our team who bring a diversity of experiences, talents and creativity to the garden we have today and envisioning our future garden.

Harry Jongerden

Harry has more than 40 years of experience as a professional gardener, garden designer and garden director. He has led the Garden Expansion Project at TBG for three years, after managing the organization as Executive Director for five years. 

Prior to his arrival at TBG, Harry held the posts of Garden Director at VanDusen Botanical Garden in Vancouver, Head of Horticulture at Royal Botanical Gardens, Ontario, and Head Gardener at the Stratford Festival. He has stepped down from the TBG Board to undertake this interim position.

Harry is the author of This Other Eden. His landscape designs include the Walkerton Heritage Water Garden and Stratford’s Elizabethan Garden. Well known in the professional gardening world, Harry was named the Garden Person of the Year in 2019 at the Canadian Garden Tourism Awards. He is also Chair of the Awards Committee of the American Public Gardens Association.

Roger Gettig

Roger joined the garden in September 2021 and was formerly employed at Holden Forests & Gardens in Kirtland, Ohio. He served many roles at Holden over the last 25 years, including VP of Horticulture & Conservation, and Curator of Living Collections & Land Assets. He played a key role in planning and managing gardens, as well as conducting public outreach in horticulture. He has a B.Sc. in horticulture from The Ohio State University and an M.Sc. in Landscape Architecture from the University of Wisconsin-Madison. He blends his understanding of ornamental horticulture and native plant communities to come up with innovative solutions to landscape problems.

Rochelle Strauss

Rochelle has over 20 years’ experience working as an education consultant, predominantly in the non-profit sector. She specializes in program design and exhibit development, creating dynamic outcomes-based programs and curating content and experiences that bring learning to life. Over the course of her career, Rochelle has been involved in programs and projects at local, national, and international levels, including working with IOC-UNESCO, Girl Guides of Canada, Ontario Science Centre, Art Gallery of Ontario, and Royal Ontario Museum.

An award-winning children’s author, Rochelle’s non-fiction books weave science and imagery to build empathy for nature and inspire young readers into action. Rochelle’s books have been published internationally, featured in curriculum programs, and incorporated into anthologies. She recently completed her third book which will be released by Kids Can Press in the spring of 2022.

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Alison Kenn

Alison joined TBG in November 2019. With more than 25 years of fundraising and special event experience in the not-for-profit sector, she has worked in education, healthcare, politics and the arts. Organizations that she has worked for include the University of Toronto, the Ontario PC Party, Canadian National Institute for the Blind, JAZZ.FM91 and Easter Seals Ontario.

Alison has an interest in our natural heritage and horticulture, and spent many years working in a Scarborough nursery while she was in high school and university. An enthusiastic birder, Alison continues to increase her knowledge of our local flora and fauna. She is a graduate of the University of Toronto.

Jenny Rhodenizer

Jenny has worked in the charitable sector for over 25 years with educational institutions serving elementary and university students as well as life-long learners. She has been leading the brand stewardship, public relations, event management and marketing efforts at TBG since 2002.  Jenny is a creative thinker who is resourceful and offers thoughtful marketing solutions. She is focused on building visually compelling stories for the garden’s online community while forging sustainable strategic partnerships and creating fun, engaging (and delicious) public events.

Jenny is Marketing Chair on the Toronto Attractions Council, a member of the American Public Gardens Association and is actively involved in the garden tourism sector.  

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Mark Hirowatari

Mark joined TBG in February 2020. A seasoned finance executive, Mark brings a focused knowledge to the organization, distilling high-level strategy into goals and objectives. Prior to joining TBG, Mark spent the past seven years in the not-for-profit sector including two and a half years as the Interim CFO for the Royal Ontario Museum. Prior to joining the ROM, he worked in Tokyo for approximately 10 years for large multinational companies including Avon Products and Oracle Corporation as country CFO. During his time in Tokyo, Mark managed teams in other parts of Asia, including China, India and Australia while reporting into headquarters located in the U.S. and Europe.

Mark started his career at PwC. He graduated from the University of Toronto and is currently a member of CPA Ontario holding CPA, CA.

Glenn Davidson

Glenn joined TBG in December 2019. Glenn has worked in the retail sector for more than 20 years including the last 15 with the LCBO holding various positions including retail training consultant, manager and most recently as a product consultant.

Glenn brings with him a passion for horticulture. He was already a TBG member prior to joining as Shop Manager and has attended many TBG events including Canada Blooms and the Holiday Market. Glenn previously owned his own landscape design company which furthered his love for plants and nature. His other passions include hockey and volunteering. He has been a hockey coach for over 30 years and has held executive positions with various hockey associations.

Mark Vitelli

Mark joined TBG in August 2021. He brings with him over 20 years of experience in operations and facilities. His most recent position was Maintenance Manager for Toronto Pinewood Studios, the country’s premier film and television studio where he was heavily involved in two building expansions that will add over 200,000 sq ft of stage and support space to Hollywood North.

Mark has created and executed many small fundraisers and looks forward to rolling up his sleeves and pitching in where needed. Mark’s experience as an entrepreneur in the service and logistics industry has fueled his passion for optimizing value, visitor experience and safety.

Tracy Mac Millan

Tracy joined TBG in September 2019. Tracy is Principal of TEM Enterprises, and has 20 years of experience in the HR field. During her career, she has held senior management positions in both unionized and non-unionized manufacturing facilities mainly in the automotive and aerospace sectors. Since branching out on her own in 2016, Tracy has been providing HR consulting services to clients in both Canada and the U.S. including many in the not-for-profit sector.

Tracy brings a broad knowledge of topics such as employment legislation, labour relations, health and safety, training, benefits, compensation, organizational development and succession planning to TBG.