For more than two decades, Diamond Food Services has been a cornerstone of Australia’s food industry, widely regarded as the nation’s leading lamb specialist.

Established in 1999 by Theo Psirakis, the business was founded on a clear vision: to deliver premium Australian lamb with unwavering consistency, care and integrity. What began as a small family operation in Strathfield South has grown into one of the country’s most respected lamb processors, supplying high-quality product throughout Australia and to markets around the world.

Theo’s commitment to excellence is deeply influenced by his upbringing in Greece, where food symbolises family, tradition and pride. That same philosophy continues to shape our operations today. Working alongside Theo are his sons, Chris and Paul, whose business expertise and dedication to quality help drive the company forward. Together, they uphold a long-standing reputation built on hard work, honesty and a genuine passion for exceptional Australian produce.