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Who's Who Legal
Who's Who Legal

Global Leader

Arbitration 2021

Professional Biography

WWL Ranking: Recommended

Peers and clients say

“Hanna is a real star”

“Hanna’s exceptional talent is matched by an extraordinary work ethic”

“Hanna is excellent at managing complex, voluminous disputes”

“She understands clients’ needs well, and is always extraordinarily well prepared, and addresses complex issues with ease”

“She is diligent and rigorous, and has a strong understanding of quantum issues”


Hanna Roos is of counsel in Quinn Emanuel’s London office, and a solicitor advocate in the English Supreme Court. She sits as arbitrator and represents leading companies and states in high-value commercial and treaty arbitrations and litigations. Her practice covers inter alia the pharma, biotech, energy (including oil, gas, nuclear and renewable), banking, private equity, insurance, telecoms, commodities, consumer goods and satellite and aerospace sectors.

She holds degrees from Oxford and Cambridge, and lectures as external professor for a master’s programme in association with Milan University.

Professor Roos is recognised as one of the “Future Leaders” in arbitration by Who's Who Legal: Arbitration 2019 and 2018, and as a key lawyer for international arbitration by The Legal 500 UK 2020.  She features on the 2019 International Arbitration Powerlist (UK) and has won awards in the Lawyer Monthly Women in Law Awards 2018 and in 2017 for medicine and ethics. She was shortlisted for the 2016 WeAreTheCity Rising Stars drawn from nearly 1,000 nominations in various industry sectors. Hanna is praised as “one of the most impressive thinkers of her generation”.

Hanna's research focuses on innovation. She sat on the CPR arm of the ICCA-CPR New York City Bar working group whose draft Cybersecurity Protocol won the 2018 GAR Best Development Award. She publishes widely, including in Butterworths Challenges in Arbitration (LexisNexis), enjoys lecturing in Scandinavia where she hails from.

Prior to joining Quinn Emanuel, Hanna practised arbitration at Freshfields (London and Paris) and Latham & Watkins (London), where she headed award-winning initiatives of the pro bono committee and co-established and co-led the global Parent Lawyers Group. 

Hanna’s free time revolves around her oculo-plastic surgeon husband, two cheeky sons, running, a steady mountain of washing and kettle bells.

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