International Civil Litigators

We are a transatlantic law firm with offices in the UK and the US. Our purpose is to make whole those who have suffered injustice. Our vision is a better world where the law works for everyone.


We share the horror and outrage over President Putin’s illegal war of aggression against Ukraine. We support the sanctions against Russia and the effort to help refugees. Being a values-driven law firm means we get to choose cases and clients we believe deeply in. It means we can choose to put our collective commercial power behind those values. For that reason, we will not engage any clients with ties to the Russian regime, any state-owned Russian entities or any entities targeted by international sanctions. Anyone, including Russian nationals, needing legal assistance against those entities is of course more than welcome to approach us.

Client TestimonialsClient Testimonials
Some of our clients share their experience of working with us to achieve justice.

I will always be grateful for your unwavering support of me. Equally, I will always be grateful for showing me how to find my voice and strength.

Title IX case against UCLA, client confidential

It was such a weight off our shoulders; suddenly somebody else with a lot more experience was managing the case.

Sandeep Mander, Mander v. Royal Borough of Windsor & Maidenhead

We really thought that there was nothing that anybody could do for us. We were wrong.

Dr Celeste Kidd, Aslin et al v. University of Rochester et al

To get the result you got you must be as tough with your legal opposites as you are kind and understanding to your clients.

AOA client, confidential

Compared with other law firms I’ve worked with, no one matches the combination that McO has of experience, brilliance, ferocious fighting and deep empathy for their clients.

Dr Holly Atkinson, Atkinson et al v. Mount Sinai Health System, Inc. et al

Because my case could not bear public scrutiny, a very powerful institution used massive financial resources to try to crush me for asking for my disability rights. This was a huge mistake, as they didn’t know that I would obtain McO representation. I couldn’t ask for better representation.

Disability Rights client, confidential

I would like to say from bottom of my heart, thank you. Thank you to all the team. Now I can go and forget my former employer. God bless you all.

Unfair Dismissal client, confidential