Siobhan has over a decade of experience practicing in all areas of matrimonial and family law, including the negotiation of out-of-court settlement agreements and prenuptial agreements, in mediation, and in highly contested divorce litigations.  

Siobhan develops strong relationships with her clients so that she can guide them to creative settlement solutions whenever possible. Siobhan’s clients value that she keeps them focused on discerning what is worth fighting for and what is not. When it is necessary to go to court, Siobhan is a strong advocate for her clients 

While Siobhan works mostly with clients who are based exclusively in New York, she also works with clients who split their time between New York and California, and clients who have assets in the United States and abroad. Additionally, Siobhan speaks French and has spent significant time living in France, including while working at the Paris office of Sullivan & Cromwell as a summer associate.

Siobhan is a fellow of the American Academy of Matrimonial Lawyers. She is a member of the New York Bar Association (Family Law section) and participates in the New York Women's Bar Association pro bono project.  

Siobhan started her career as a corporate litigator at Simpson Thacher & Bartlett LLP and Covington & Burling LLP, where she represented financial institutions in complex financial cases, and both employers and executives in compensation matters.    

Siobhan serves as co-chair of the scholar advisory committee for the Jackie Robinson Foundation, a nonprofit organization which provides scholarship support and leadership training to promising and talented college students. As a co-chair, Siobhan manages the scholarship selection process for the northeastern region, organizes programming for the cohort, and mentors students.