On qualification in 2003, Antonia joined city firm Kingsley Napley as a solicitor specialising in family law. In 2007 she moved to market-leading family law firm Withers LLP before founding Burgess Mee in 2013 alongside Peter.
In her time at Withers LLP Antonia acted for the wife in the reported case of JKN v JCN which involved a transatlantic divorce. More recently she was the solicitor advocate for the respondent in the High Court case of TW v PL. She has also worked on many small, medium and high net worth financial cases and complex children cases, including cases where there are allegations of sexual abuse.
Antonia has particular experience in those difficult cases where there may be one party with narcissistic traits or a personality disorder, which need to be handled with great sensitivity and care.
Chambers and Partners 2023 note Antonia for her recommendations in representing parents in international leave to remove cases, handling matters involving allegations of abuse and her work on cases involving parental alienation, coercive control and abuse. Commentators say, “Antonia is fantastic; she is very knowledgeable and works tirelessly for her clients”. Commentators for Chambers and Partners 2022 say "She is a very robust lawyer. She is very technically skilled, forthright and a pleasure to deal with. She is happy to fight her client's corner but is also commercial and practical", "She's really thorough, personable and intelligent. I would certainly recommend her".
In the Legal 500 2022, it is stated “‘Antonia Mee has all the qualities of a great family lawyer. She is empathetic yet frank, explaining the best route forward with great clarity. I never had any doubt that I was in the safest and most capable of hands. Her calm, unruffled nature is reassuring. She makes every effort to make herself available when urgency is required and has great agility, adapting to changes in circumstance with efficiency and ease. I would recommend her wholeheartedly, and without any hesitation’. Antonia is also described as “a powerhouse. She is totally unafraid of the opposition but equally happy to guide her clients to a pragmatic and commercial consensual outcome with the other side”.
In 2021 Chambers and Partners quoted from an individual "She is really excellent - considered, careful, tactical and client-focused", in 2020 they said Antonia "cuts through the issues and gets to the point, but at the same time she is very sensible and always focused on the client" and in 2018 Antonia was described as "a hard-working, dedicated and experienced practitioner who exudes considerable confidence and who inspires a lot of respect."
Antonia has lectured on family law, written articles in the legal press and has contributed to text books on divorce.
She was formerly Secretary of Resolution (London Region) and sat on the steering committee for 'Parenting After Parting', an initiative designed to help separated parents rebuild their parenting relationship for the sake of the children.
Antonia co-founded the family law advice clinic at the Peckham CAB where she is a voluntary advisor and has trained McKenzie friends to assist litigants in person.