Theo Kalidonis established Kalidonis Pty Ltd in 2000. Beginning his career in Darwin as a form worker, he noticed the growing local demand for specialist construction services. Over the past 10 years Theo has built a successful reputation within the community and the building industry alike, by providing quality concrete services to the highest possible standard. Today the business employs a team of 15 full-time workers and over 20 subcontractors. Kalidonis Pty Ltd has played a major role in the development of commercial, residential and civil infrastructure across Darwin and the Northern Territory. Our clients have included the Northern Territory Government, Goodline, Sitzler, Larrakia Development Corporation, GT Builders, Gratis Pty Ltd, GRD Group, MBP Builders, BMD Construction Pty Ltd and BHP. We have more recently diversified and expanded to service the mining sector across the Northern Territory and Western Australia. We provide mining infrastructure for above ground projects such as treatment works for onsite camps, mineral processing facilities and sewerage plants. Our underground mining infrastructure work includes cementing the underground tunnels for mining and exploration. Our clients and colleagues include but are not limited to BHP and Goodline.

HY-TEC is an innovative company supplying quality products supported by a reliable and superior service to builders, contractors, civil engineers, government bodies, designers and retail customers. We focus on accurate delivery times, taking direct customer enquiries at each concrete plant and quarry, supported by a large fleet of concrete trucks for quick response and best in class on time delivery. Our service is personal and our account managers are responsive to customers' enquiries and needs. We have a fantastic decorate concrete range with mixes being designed for individual customer's requirements for exposed, coloured and polished concrete.