LAWYER PROFILE

Monika Diehl

Europe 2026

Clifford Chance

Ranked in 2 practice areas

Arbitrators

Poland

1 year ranked

Arbitration

Poland

1 year ranked

About

Provided by Clifford Chance

Practice Areas

Monika Diehl focuses on dispute resolution, including commercial and investment arbitration, and is a member of our International Arbitration Group.

She has many years of experience representing clients in complex litigation and international arbitration disputes spanning a variety of sectors, including oil & gas, renewables, infrastructure, real estate, TMT and finance. She has a notable track record in investment treaty arbitrations, with a particular focus on the CEE region. Her expertise is further enriched by the time spent on secondment with the Frankfurt international arbitration team. She also has extensive experience in cross-border regulatory and white-collar crime internal investigations, as well as compliance.

Career

University of Warsaw, Faculty of Law and Administration 2012

University of Warsaw, Faculty of Journalism and Political Sciences (International Relations) 2012

Joined Clifford Chance 2012

Admitted as an advocate (adwokat) in Poland 2016

Professional Memberships

Member of the Warsaw Bar Association (ORA w Warszawie)

Member of the ICC Poland National Committee

Member of the ICC Commission on Arbitration and ADR

Member of the ICC Poland Compliance Commission

Chambers Review

Provided by Chambers

Chambers European Guide

Arbitrators - Poland

Up and Coming

Individual Editorial

Monika Diehl is recognised for her experience assisting clients with BIT and ICSID arbitration proceedings. She is also well placed to advise on set aside proceedings. In addition to her role as counsel, she is also well known for her work as an arbitrator.

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Arbitration - Poland

Up and Coming

Individual Editorial

Learn more about this team View ranking table

Strengths

Provided by Chambers

Monika Diehl has a very quick reaction every time. She is really good at thinking outside the box, being proactive and choosing the right strategy, not going into dead ends unnecessarily.
ArbitratorsChambers European Guide
Monika Diehl handles complex cases with ease, works tirelessly and delivers great results.
ArbitratorsChambers European Guide
Monika Diehl has very broad international experience, I'd say she's a true international arbitration lawyer.
ArbitratorsChambers European Guide
Monika Diehl is an outstanding lawyer who consistently leads complex international cases with confidence and clarity. She is a strong lawyer, always ready with strategic, well thought-out arguments.
ArbitratorsChambers European Guide
Monika Diehl’s support in arbitration is characterised by a blend of legal acumen, strategic insight and a dedicated client focus.
ArbitratorsChambers European Guide