Dexter Guballa

Dexter Guballa is the owner and operator of ATS Test and Tag Hornsby, bringing a strong background in science, customer service, and attention to detail to every client engagement.
After completing a Degree in Medical Sciences at the University of Technology Sydney, Dexter worked in pathology laboratories where he was responsible for testing human blood, urine, and COVID-19 samples. He later moved into the university sector, where he further developed the meticulous approach and attention to detail that now underpin his work in electrical safety testing and compliance.
Dexter also built a successful career in medical device sales, specialising in CPAP therapy equipment. His commitment to customer service and helping people achieve positive outcomes saw him nominated for a Rookie of the Year award, recognising both his sales performance and customer-focused approach.
As a local business owner, Dexter values building long-term relationships with clients and delivering reliable, professional service. His friendly nature, strong communication skills, and genuine desire to help make him a trusted partner for businesses across the Hornsby region.
Outside of work, Dexter enjoys staying active and is a regular participant in the local parkrun community every Saturday morning. He also runs with a local running club and regularly takes part in charity and fundraising events, reflecting his strong sense of community involvement.
When he’s not working or running, you’ll often find Dexter spending time with his wife, family, and friends, or working on his weekend car projects, carrying out maintenance and upgrades. He is passionate about continuous learning and is always looking for opportunities to expand his knowledge, improve his skills, and learn from others.
Whether you’re a small business, school, healthcare provider, or large organisation, Dexter is committed to providing professional, dependable, and compliant testing and tagging services with exceptional customer care.
Regardless of the size of your organisation, Dexter and ATS can handle your service requirements.
Please contact Dexter for a free quotation on all your electrical appliance test and tag requirements.
You can find out more about ATS’s services in NSW on the Test and Tag Sydney and NSW page.
Services available in Hornsby
Dexter provides the following electrical safety and essential services compliance to businesses in Hornsby and surrounding areas:
Test and Tag — portable appliance inspection and testing to AS/NZS 3760:2022
RCD Testing — safety switch inspection, testing and tagging
Exit and Emergency Light Testing — 6-monthly discharge tests to AS 2293.2
Fire Protection Equipment — extinguisher and fire blanket inspection to AS 1851:2012
Microwave Leakage Testing — radiation safety testing for commercial microwave ovens
Minor Repair Services — plug and socket repairs, lamp replacement
Testimonials
Our school had the electrical tagging yesterday. They acted in a professional manner and were courteous when dealing with staff. They moved about the school without disruption and performed their jobs quickly and efficiently. Thanks for the great service.
Peter, Principal, Metella Road Public School
Excellent service all round.
Diane, Campsie Public School
The People who attended our school, did a fantastic job. Thank you.
Faulconbridge Public School
The staff from ATS were very polite and acted in a professional manner. It was a pleasure having them working in the school doing the tagging
Mt Riverview Public School
Very professional and easy to get along with
Wendy, Loreto Normanhurst
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Areas Serviced
- Pymble
- Turramurra
- Wahroonga
- Hornsby
- Mount Colah
- Mount Kuring-gai
- Berowra
- Berowra Heights
Find Dexter on Google
⭐ See our reviews and find Dexter on Google Maps: View Dexter Guballa – ATS Test and Tag Hornsby on Google
ATS Test and Tag Hornsby – Local Electrical Safety Specialists
| Day | Hours |
|---|---|
| Monday | 7:00 AM – 5:00 PM |
| Tuesday | 7:00 AM – 5:00 PM |
| Wednesday | 7:00 AM – 5:00 PM |
| Thursday | 7:00 AM – 5:00 PM |
| Friday | 7:00 AM – 5:00 PM |
| Saturday | Closed |
| Sunday | Closed |
For more information about electrical safety compliance requirements in NSW, visit our Test and Tag NSW page.
Hornsby NSW 2077
Australia
| Monday | |
| Tuesday | |
| Wednesday | |
| Thursday | |
| Friday | |
| Saturday | Closed |
| Sunday | Closed |