PLCs are the brain of industrial automation
We plan, design and implement programmable logic controllers (PLC) on behalf of our clients including PLC and Operator Panels that control processes and perform functions flawlessly. Like PLCs, our highly-trained technicians are continuously evolving and growing, staying current with the latest technological advances in PLC programming to provide world-leading solutions to our clients.



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.