Una Deretic focuses on mergers and acquisitions for both private and listed companies, joint ventures and debt and equity financings, as well as regularly providing general corporate advisory services. She has considerable international experience having advised on numerous deals with cross-border elements, and is well versed in project managing large transactions involving foreign jurisdictions.

In addition, Una has counseled on a range of corporate transactions in the retail/consumer, natural resources (in particular oil and gas) sectors.


Prior to joining Armstrong Teasdale, Una was a corporate law partner at Kerman & Co. in London, where she worked for more than 13 years. She joined Armstrong Teasdale in early 2021 when the firms combined. Before that, she worked as a solicitor and trainee solicitor at other firms in London.


  • Queen Mary University of London  (LL.B., 2002)
  • College of Law  (LPC, 2003)


  • England and Wales, 2005

Professional Activities

  • Women in Mining (Member)


  • The Legal 500, Recommended Lawyer, Projects, Energy and Natural Resources: Oil and Gas, Mining and Minerals and Corporate and M&A (2018-present)
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