Hannah is an expert in family law and has experience working with a range of clients on cases relating to finance and children. She has dealt with many high-value, complex divorce cases, helping them to reach final settlement over finance and assets.
A number of the child cases she has advised on have involved international elements, including South Africa, Germany and America. Most recently she has handled a complex acute alienation case enabling a child to re-establish their relationship with the alienated parent.
Hannah is also a psychotherapeutically qualified mediator and has trained with Regents College and also with the National Family Mediation organisation.
Expertise
Hannah advises on financial division and asset distribution upon divorce and separation, prenuptial and postnuptial agreements, and resolution of disputes through mediation.
Experience
Represented the wife of a C-Suite American banker in a high-value divorce involving US tax implications and a complex remuneration package involving one of the first ever arbitrations.
Represented a husband in UHNW complex financial proceedings involving offshore companies in Cayman, BVI and satellite litigation in Singapore.
Supported a HNW elderly client in a financial case involving companies, farms and a portfolio of 80 rental properties.
Please note: The experience list above may include examples of work completed prior to joining Keystone Law.
Recognition
Recognised by Chambers UK for Family/Matrimonial Finance: High Net Worth 2026
Recognised by The Legal 500 for Family: Children 2026-2027
Recognised by The Legal 500 for Family: Divorce & Financial Remedy 2026-2027
“Hannah Sisk is a knowledgeable and experienced lawyer who really fights for her clients. She is also a brilliant strategist.”
Chambers High Net Worth 2026
“Hannah Sisk is highly responsive, calm under pressure and consistently on top of the detail. She combines excellent client care with real strategic judgement. She quickly understands what matters, explains options clearly, and gives practical, realistic advice that keeps momentum in the right direction.”
Chambers High Net Worth 2026
“Hannah Sisk provides excellent client care.”
Chambers High Net Worth 2026
“Hannah Sisk was excellent. Well-prepared, calm and good-humoured so that her client had complete confidence in her abilities and judgment. I would unhesitatingly recommend her to those with matrimonial and financial difficulties”
The Legal 500 2026
Hannah qualified as a solicitor in 2008 and prior to joining Keystone Law in 2022, she worked at Streathers.
