Our People

The Jeff's team sticks to the simple values we started with back in 1994: friendliness, hard work, honesty and integrityRead the bios below to learn more about some of the people you'll be working with at Jeff's.

Jeff Ronhaar of Jeff's Outdoor

Jeff Ronhaar of Jeff's Outdoor

Jeff Ronhaar

Head Coach since 1994

Meet Jeff

Jeff's Outdoor began when an enterprising 14-year-old decided to turn paper route customers into lawn care customers. Jeff started with one mower and never looked back. (By the way, looking back is the last thing you want to do when you’re operating a mower.)

The son of Dutch immigrants, Jeff grew up always wanting his own way. He claims he rarely got it. That's debatable. He did get plenty of lessons about hard work, determination, and, above all, treating people right.

After developing the maintenance side of the company, Jeff turned his attention to design-build projects. Jeff continues to grow his business—or, as he puts it, “polish the apple”—through professional development, association memberships and peer groups. Ultimately, Jeff aims to fully understand how he can help his customers get maximum enjoyment from their properties—whether that's by helping them create amazing outdoor spaces, or eliminating maintenance headaches.

Jeff still wants to get his own way once in a while. But with a wife, two girls, three grand-daughters and a couple of girl dogs, that’s not happening any time soon.

Our Management Team

Dave MacMillan of Jeff's Outdoor


Dave MacMillan of Jeff's Outdoor

Dave MacMillan

Design-Build Supervisor since 2005

Dave has the gift of the gab. He even practices public speaking in his spare time. Dave’s other interests include antiques, general old world craftsmanship and fine wine. At work, those interests serve him well (aside from the wine, anyway). Dave has worked in the landscape industry for over 20 years. He is determined to do things right; our staff are able to learn from his example every day. Dave’s eye for quality, his industry experience and his leadership skills speak volumes and our clients see his attention to quality in every project.


Paul Dumaresq

Maintenance Client Rep since 1999

Paul has been with Jeff’s since 1999. In fact, he’s the second person Jeff hired. His main role is maintenance sales, but we have a hard time keeping Paul from getting his hands dirty. He’s also often got his nose buried in a book or magazine, researching new techniques, trends, plant materials...chipping...putting. Paul has spent years maintaining hundreds of properties and he does so with passion and with pride. And Paul is a family man. Jeff and Dave like to talk, but when Paul has a story going about his kids, no one gets a word in edgewise.

Melanie Morris of Jeff's Outdoor


Melanie Morris of Jeff's Outdoor

Melanie Morris

Administrator since 2011

Melanie keeps our people and our paper organized and accounted for. She makes sure we pay the bills, meet our appointments, do our work and eat our peas. Melanie is the person you’ll talk to when you call. She always has our clients’ best interests at heart. She loves walking her dogs down at the river, and sometimes she brings them to work. They’re good company and they listen better than we do.

Trevor Coulson of Jeff's Outdoor


Trevor Coulson of Jeff's Outdoor

Trevor Coulson

Maintenance Supervisor since 2011

Trevor became our Maintenance Supervisor after years running our top maintenance crew. Trevor is known by our clients for the consistent quality of care he brings to every property. Trevor sets the standard that all of our crews follow. When it comes to maintaining his hair style, Trevor also follows a strict regimen. There are always a couple of guys around ready and willing to help him with a trim.

Mike Lessard of Jeff's Outdoor


Mike Lessard of Jeff's Outdoor

Mike Lessard

Design-Build Client Rep since 2015

Mike has a background in client services. Mike likes to volunteer in the community: we like that about him. He is currently the vice president at the Dunnville Chamber of Commerce. Mike is also a very fast skier — or at least he claims to be. We're fine with that because we know he always takes his time with our customers.

Rick Wiltshire of Jeff's Outdoor

Rick Wiltshire of Jeff's Outdoor

Rick Wiltshire

Fix-All since 2011

We’ve got a lot of equipment. To provide reliable service, it needs to be in tip top shape. Rick makes that happen. One of the first things Rick did at Jeff’s was take apart a Bobcat. Jeff walked into the shop to find hundreds of parts spread out over the floor. Rick’s explanation did not inspire confidence: “I’ve never done this before. Don’t touch anything!” An hour later Rick drove past the office honking the horn! Rick works on our machines during the week so he and his wife Sandy can enjoy touring their motorcycles on the weekend.

Kellie MacMillan of Jeff's Outdoor

Kellie MacMillan of Jeff's Outdoor

Kellie MacMillan

Social Media Director since 2014

Kellie is a passionate person...she loves to garden, cook and do creative things. She is a wine sommelier and blogger and has even won numerous awards for what started out as a great hobby to share with her husband, Dave. Kellie looks after some of our estate property gardens and also manages our social media platforms — if you're on Facebook or Instagram, be sure to follow along.

Join our Team!

You love to work outside so other people can relax there.

Do you love working and playing outside? We're always looking for smart, hard working people who are in their element in the great outdoors. You love to work outside so other people can relax there.

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About Jeff's


Jeff's Outdoor offers full landscaping services in and around Haldimand County, serving Caledonia, Binbrook, Stoney Creek, and the Greater Hamilton Area.



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Get in Touch!

Click the Contact Us button to the right to fill out our contact form.

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Give us a call, stop by, or send an email. We're open Monday to Friday, 8 a.m. to 4 p.m.

Tel: (905) 765-4200
Email: info@jeffsoutdoor.ca
1500 Stoney Creek Road
Caledonia, Ontario N3W 1R2

Contact Jeff's How can we help you get the most of your outdoor space?