Our Team


NZ Grinders consists of talented people who helped make the company what it is today.

Head and shoulder portrait of Glen strongman


NZ Grinders, Owner, Managing Director

Glen Strongman’s background is in the marine industry in both engineering and construction.  He took over the business at NZ Grinders in 2021 and is carrying on the vision of high quality work and going the extra mile for his customers – to make sure you get the result you want within your time frame and to your budget.

Mobile 021-434-199

Head and Shoulder portrait of Dion Mcgarva North Island General Manager NZ Grinders Polished Concrete


General Manager North Island

With over 25 years experience in the flooring industry in NZ with a vast background in his own business specializing in epoxy coatings and floor grinding, our new manager sold his business and had time off before looking for another challenge. Concentrating on sales, he is our go-to knowledge base for all things concrete flooring.

Mobile: 027-543-2051

Mike Crowley | NZ Grinders


South Island Managing Director

Mike is based in the beautiful Wakatipu basin and has overseen the finishing of many top-end home polished concrete floor choices in the Queenstown-Lakes area. He has an extensive working knowledge of the local aggregate and how to get the look you desire in your build – from concrete pouring to completion.

Mobile: 027-281-8815

Ian Humble | Sales Manager | NZ Grinders


Sales Manager

Ian’s working life has focused on sales. He joined NZ Grinders in 2017. Customer service and follow up is his priority to ensure you are 100% happy with your new floor.

Mobile: 021-434-575

Scott Campbell | Foreman | NZ Grinders



Scott is passionate about concrete grinding and polishing and there’s not much he doesn’t know about the industry.  A keen problem solver he is the man for any jobs that require creative thinking

Director | NZ Grinders


Account Manager

A qualified Accountant, Trish joined NZ Grinders in 2022, and comes from a background of lecturing at tertiary level.

Concrete polishing and grinding specialists