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Our Team

Our viticultural and winemaking team has over 30 years experience and a deep understanding of our vineyards. They are the custodians of these vineyards and the grapes they produce.




Adelaide Hills born and bred, Mike graduated with a Bachelor of Arts Degree whilst working at the Petaluma winery in the early 1990s. He developed his passion for wine whilst working vintage in Oregon in 1995 and on his return home undertook his degree in Oenology at Charles Sturt University.

Mike was the Sparkling Winemaker for Croser from 2000 and in 2005 was promoted to Petaluma Winemaker in 2005, then Winemaker/Manager in 2010. He was instrumental in the build and transition of Petaluma to its new state of the art winery at Woodside in 2014.

Now in his 30th year at Petaluma he brings a breadth of experience and knowledge in all facets of the business from vine to glass. Mike has been blessed with exceptional vineyards that display the true expression of the varieties that Petaluma produces.

Mike is married to Ali with three children. In his spare time he is Commodore of the Robe Yacht Club, is coach of two basketball teams, loves mountain biking and driving his old Kombi on car rallies into the outback with his family and friends.




Viticulturist at Petaluma and Croser since 1996, Mike Harms’ approach is grounded in attention to detail and timing. He favours an organic approach to foster biodiversity and healthy soils, ensuring the vineyards produce grapes that express the characteristics of each site and the vintage.

Mike had a background in commercial banking, leaving the sector to study Agricultural Science in 1992. This drew on his fascination for biological systems and love for the wine industry that began in his formative years, growing up in the Barossa Valley where his father worked as an accountant for Orlando Wines in the late 1960s. Mike believes strongly in nurturing and supporting healthy and positive relationships with growers and vineyard workers.

Married to Lisa with two children, Mike loves spending time with family and friends. A passionate motorsports enthusiast, he enjoys off-road motorcycling in his spare time.