Isolating the issue, before it becomes a problem.
Coupled with bespoke electrical solutions, our team provides effective, regular maintenance to ensure equipment and systems remain productive and in optimum working condition.
In an environment where safety and security are paramount, all Hennessy work is conducted under strict electrical trade profession and WorkSafe NZ safety guidelines so you can rest assured your equipment complies with latest industry standards.
Reliable, dedicated, ongoing service reduces the potential of major production interruptions. We’re dedicated to our clients’ success because that’s our success too.


From high-stakes greenfield electrical project work to EVC installations, our clients count on us for our technical know-how, project experience, and reliable, expert support to help keep their project running smoothly.

Hennessy offers a comprehensive range of electrical services, from appliance testing and thermal imaging surveys to ongoing maintenance and prompt breakdown support.

With decades of experience in electrical engineering, our expert electricians can assist with a variety of electrical needs, from commercial general lighting right through to switchgear and transformers for heavy industry.

Hennessy offer fully qualified instrument Technicians who carry out Instrumentation Calibration, commissioning, and installation services for clients across the Waikato region.

We offer bespoke design, planning and installation of production factory and warehouse automation systems for supply chain manufacturing, food and beverage production, robotics, retail and agricultural industries.