Adrian Tembel is a prominent South Australian lawyer and businessman and is an economics and honours law graduate of the University of Adelaide. He began practising corporate and technology law at Thomson Geer in 1993, became a Partner of Thomson Geer in 1997, and went on to become Chief Executive Partner in 2009 and held the position ever since.

When operating as a full-time lawyer Adrian specialized in the Corporate and Technology space and had the opportunity to serve on some amazing pieces of work, one name was with one of the greatest drivers in Formula One, Ayton Senna's Merchandising team.

Adrian’s focus is now on leading Thomson Geer, where as Chief Executive Partner, he has grown the Adelaide-headquartered Thomson Geer to a major Australian Law firm with annual revenue close to $200m.  

Thomson Geer is ranked the 10th largest law firm by partner number, 22nd in South Australia's top private companies and rose 32 places in the 2019/2020 Australia's top 500 private companies ranking, and now has offices all across Australia in Adelaide, Sydney, Melbourne, Brisbane, Perth.

Adrian is an Adviser to the Premier of South Australia, Steven Marshall, and in 2018, Adrian was appointed as a Commissioner of the South Australian Productivity Commission and went on to become Chair of this commission in July 2021, Adrian,  and further to this he also has time to serve as a Director of the Menzies Research Centre.