Equality and anti-discrimination lawyers

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International Civil Litigators

UK, US and European Commercial Lawyers

Employment, discrimination and sexual abuse lawyers, with expertise in higher education, online reputation and family law.

A transatlantic law firm with offices in New York and Greater London.

Our purpose is to make whole those who have suffered injustice. Our vision is a better world where the law works for everyone.

About us

We’ve built an international reputation for representing survivors of discrimination and abuse, including cases where victims and perpetrators are in different countries. Our experienced US attorneys and UK solicitors have taken on some of the world’s most powerful and sophisticated institutions.

Our expertise in transatlantic transactions and litigation has seen us bring landmark cases. From race, age and gender discrimination at work and in universities, to divorce, cyberabuse and corporate advice, we want you to thrive.

McAllister Olivarius got a call from a broken human being, a human being who didn’t want to go on living. And through the course of this whole case, they helped to give me so many reasons to keep fighting, to keep living, to keep advocating, to the very end goal where I came out feeling like one of the strongest people I’ve ever met. And with a sense of justice and strength that I think only people who’ve gone through struggles like this can attest to and understand.

Chrissy Chambers, YouTuber, activist, performer and victim of revenge porn

I want to thank you for all that you have done and all that you will do for the victims of sexual abuse in care homes. It must help many of the victims to get redress and recognition of the abuse they suffered whilst in the care of people who were meant to help them. At times it must be harrowing, and it certainly cannot be easy for you to deal with it. I very much appreciate all that you have done and are doing to help those who, at the time of their lives when they needed help, were instead abused in the most horrific way. I have the utmost respect for you and your team.

Confidential client, Lambeth Redress Scheme

Thank you very much for helping me and being such a great lawyer and friend to me through this.

Confidential client, sexual assault case

I realized what I needed most of all was to just be heard…and believed. Working with all of you has been the only positive thing that has come out of this experience.

Confidential client, Title IX case

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.

Confidential client, Title IX case against UCLA

The professionalism and the way you dealt with my case from day one inspired trust. I will recommend you to anyone who is in need of employment advice.

Confidential client, unfair dismissal case

McAllister Olivarius is a force of nature, yet at the same time they made sure that all of my concerns were addressed and that I was always as comfortable as possible.

Disability Rights client

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

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

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

I'm so deeply grateful for your work on my behalf and I couldn't be happier about how this has all turned out. I'd like to think that other people can experience the same relief.

Dr. Angela Rasmussen, workplace discrimination

Working with the team at McAllister Olivarius was a revelatory experience. Their combination of persistence and compassion makes them truly outstanding. They fought for me together, and together they empowered me.They are advocates in the truest and best sense of the word.

Dr. Mara L. Keire, Distinguished Fellow

I wish I could fully express how grateful I am. The joy of getting to know you, working with your team and feeling like a part of your family will never escape me. Your collective kindness, brilliance and friendship are part of the fabric of who I am today.

Female senior executive, whistleblowing and retaliation case

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

I cannot thank you enough for what you have done. You have just been brilliant. The tone of your emails to [my university] was so perfect and made me feel very powerful. I already feel like a huge weight is lifted off my shoulders, and actually feel excited about the future.

Senior academic, workplace intimidation case

It was wonderful working with you, I honestly couldn’t have had better lawyers. I really appreciate your values and how you didn’t silence me or pressure me to do something I’m not comfortable with.

Senior employee, unfair dismissal case

I just wanted to say thank you for all the time, work and heart you’ve put into this dratted case. You have helped me through many a down time. All I can say is I’m extremely happy it’s over and I can now look forward instead of backward.

Senior executive, equal pay case

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

Thank you all for a job well done. You really stepped into the breach and I’m deeply grateful for your brains and energy.

US journalist and author, defamation case

I have recently enjoyed working closely with Ann Olivarius KC (Hons) and her excellent team on a complex matrimonial financial dispute. Ann brings huge knowledge and commercial experience to her cases. She really goes the extra mile and works hard with her team to secure the best possible outcome for her clients. Nothing is too much trouble (day or night). Problems are addressed. Practical solutions are found. Her clients are truly fortunate to have her in their corner.

 Philip J Marshall KC, 1 King’s Bench Walk

Thank you so much for the support you've given me. We managed to get a good deal and I'm glad! I will not hesitate to recommend you to anyone experiencing a dispute at work.

Confidential client, unfair dismissal – settlement agreement, employment

I am a survivor of child sexual abuse from Ireland, now living in the US. For the past for years McAllister Olivarius has flawlessly represented me. From the investigations team to the numerous solicitors, these people worked for four years on my case and never gave up. Even during the recent pandemic, the work never stopped.

Derek McCarthy, historic child abuse case