Family-Owned
Business

Through the three generations of Dempsey family leadership, Grammar Group has grown and changed with industry. We have dedicated ourselves to staying on the forefront of technology and delivering on our family values of exceptional service to our community and customers.

About Us

Established in 1948, Grammar Electrical is highly experienced in delivering cost-effective and robust solutions for small jobs through complex workflows. Through the three generations of Dempsey family leadership, Grammar Electrical has grown and changed with the industry.

We have dedicated ourselves to staying on the forefront of technology and delivering on our family values of exceptional service to our community and customers.

In 2022, we acquired Water Works further expanding its offerings to customers by providing plumbing, gas fitting and roofing works. Today, Grammar Group offers top-notch electrical and plumbing services, rooted in a commitment to delivering "Good Vibes" through every project.

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1984

The Beginning

2019

Acquisition

2022

Acquisition

2023

Acquisition

2024

2025

2026

Present
The Beginning

1984

Acquisition

2019

Acquisition

2022

Acquisition

2023

2024

2025

Present

2026

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Our Leadership Team

Our leadership team brings decades of industry experience - not just on the tools, but across project management, compliance, business operations, and client relationships.

They’re hands-on, forward-thinking, and committed to delivering high-quality work and a strong team culture.

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Aaron Dempsey
Director
aaron@grammarelectrical.co.nz
Matt Wannenburg
General Manager
+64 211 792 515
mattw@grammarelectrical.co.nz
Timothy Ballantyne
Commercial Manager
+64 274 131 459
tim@grammarelectrical.co.nz
Jamie Mulvany
Business Development Manager
+64 220 892 388
jamie@grammarelectrical.co.nz
Jason Fullam
Projects Manager
+64 217 244 47
jason@grammarelectrical.co.nz
Chris Richardson
Services Manager
+64 027 546 7480
chris@grammarelectrical.co.nz
Jess Dempsey
Human Resources Manager
jess@grammarelectrical.co.nz
Ever Leigh Chua
General Manager for Admin
ever@grammarelectrical.co.nz
Xavier Judd
Industrial Team Lead
+64 27 515 5580
xavier.judd@grammarelectrical.co.nz
Justin Caine
Service Team Manager
+64 210 275 9598
justin.caine@grammarelectrical.co.nz
Timothy Groen
Plumbing Team Lead
+64 211 233 057
tim@water-works.co.nz
Zane Van Aswegen
Roofing Team Lead
+64 272 900 372
zane@roof-works.co.nz

Skilled, Qualified, and Easy to Work With

Our team of tradesmen are all New Zealand registered and bring a broad range of experience across residential, commercial, and industrial work. Whether it’s a complex site install or a quick call out, they show up on time, work safely, and deliver high standards - every time.

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Ricky
Lane
Ashton
Nicholas
Mohamad
Jayden
Nathan
Kevin
Ben
Sam
Ricky
Keegan
Zac
Nick
Aaron
Luca
Deon
Ben
Andre
Kieran