Fresh out of university with a pharmacy degree, Mario Verrocchi, became a trainee under Sam Gance in 1980. The brothers expanded to three locations before leaving the Amcal chain in 1997 and establishing their own brand, My Chemist.

Chemist Warehouse is an unlisted Australian public company. It is a franchisor of around 600 pharmacies and retail stores under the brands Chemist Warehouse, MyChemist, Ultra Beauty, My Beauty Spot, and Optometrist Warehouse.

Gance started his first pharmacy business with his brother Sam Gance, who is now Chemist Warehouse's CEO. In 1976, they established a successful sunglasses, perfume and suntan lotion company - Le Specs and Le Tan - which they sold in 1991.

The origins of the Chemist Warehouse empire dates back to 1980, when Mario Verrocchi got a job working for pharmacist brothers Jack and Sam Gance at a Reservoir chemist. They went on to launch Chemist Warehouse, which has expanded to more than 500 stores across Australia.