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Callen is a senior lawyer with a broad practice. He is also responsible for the day-to-day management of the Clare office.


Callen joined Mellor Olsson in 2014. He has over a decade of experience in general legal matters and is passionate about providing an outstanding legal service to the community of Clare and its surrounding areas.

He has a diverse practice and advises clients in a range of business succession and restructuring, general business and property transactions and conveyancing matters. He has a large practice in Wills and estates where he advises clients on important documents including Wills, Testamentary Trusts, Powers of Attorney and Advance Care Directives and general estate administration. He also assists clients with family law issues with a particular emphasis on property settlement matters. A significant part of Callen's practice involves acting for people involved in the agricultural industry, such as farmers and viticulturists, and he also acts for local small to medium sized businesses.

With the growing need for renewable energy, Callen is increasingly advising landowners on legal agreements in relation to environmental activities such as wind and solar farms.

Callen was born and raised in rural Eyre Peninsula and since starting his career has chosen to practise in rural areas. Understanding the importance of contributing to his local community, he frequently assists a number of not for profit and sporting groups with legal issues. He regularly visits Burra, Kadina and Riverton to assist local residents with their legal needs.


  • Bachelor of Laws and Legal Practice
  • Bachelor of Arts