About Design Cert.
Building services engineers working to make a difference.
Trusted by world-class brands and organisations of all sizes.
Design Cert is an Australian owned and operated company, located near the Sydney CBD. We offer a wide range of engineering and consulting services for Building Services in the fields of Fire Protection, Mechanical, Electrical, Plumbing, and Evacuation Planning.
Founded to Make a Difference
Design Cert Pty Ltd (DC) was established by Leigh Hajek around 2022 with a profound mission: to revolutionize the design and construction process. The company operates under the belief that intelligent and efficient decision-making during these critical phases significantly impacts the performance and safety of the final product.
Leigh’s journey to founding Design Cert was influenced by a family heritage deeply rooted in the fire and security industry. Drawing from this background, Leigh established the company with an extensive network of skilled professionals. Today, Design Cert operates in multiple states across Australia, forging vital partnerships and striving to make a tangible difference in the industry.
Why we are different.
Our difference: Bridging Design & Reality.
Design Cert Pty Ltd (DC) stands out for our ability to bridge the gap between design theory and practical reality. We’ve observed a common disconnect where design consultants’ plans on paper often lead to inefficient and costly outcomes in the real world.
Our experienced DC team is deeply versed in the construction process of building services. This firsthand knowledge allows us to take a realistic approach to complex system design and consulting issues. We understand the realities of construction, ensuring our designs are not just innovative but also practical and cost-effective.
Vision
Create a safer and more sustainable building industry.
Mission
Ensure our clients get the most cost & performance effective design solutions to satisfy their needs.
Our Expertise
At Design Cert (DC), our primary focus is to ensure all your needs are not just met, but exceeded, with a commitment to the highest quality of standards.
Inspection & Testing
MEPF Building Service Design
Evacuation
ESD Services
Block Plans
Founded by
Leigh Hajek
With 10+ years in the building services consulting and construction industry, Leigh Hajek has studied a Bachelor of Mechanical Engineering (Honours), Diploma of Fire Systems Design, and is currently studying a Master of Fire Safety Engineering
