Fellow of the Chartered Institute of Arbitrators; accredited for mediation by the Institut d'Expertise d'Arbitrage et de Mediation (IEAM), the Paris Bar; Core Solutions; CEDR (commercial mediation); CEDR/ECT/ICSID (investor-State mediation programme); Smile UK/Resolve UK (community mediation). Registered Mediator with the Civil Mediation Council (England & Wales) and Scottish Mediation. 

Marzia worked in Studio Legale Tributario in association with EY (Italy) from 2008 to 2019, being head of the Milan litigation department from 2011. In 2017 became an associate member of the firm until 2019, when she founded her personal litigation boutique (Studio Legale Scura) in Milan.

"Katherine Bell is a Partner in Schellenberg Wittmer's Dispute Resolution Group and heads the Construction Practice Group in Zurich. Her main areas of practice are domestic and international litigation and arbitration. She advises clients front-end to back-end on complex construction and infrastructure projects and specializes in the resolution of disputes arising out of complex construction, engineering and infrastructure projects across a variety of industries. In addition, she represents clients in disputes in connection with commercial tenancy and lease agreements. She acts as counsel and arbitrator in arbitral proceedings and represents parties in litigation proceedings before Swiss courts. In addition to her disputes practice, Katherine regularly advises clients on public procurement matters, contract drafting and negotiation, contract and claims administration and dispute avoidance. Katherine is a lecturer on Construction Law at the Campus Sursee Educational Centre for Construction. She is a member of the editorial board of Construction Law International (CLInt), the magazine of the IBA International Construction Projects Committee. She is also a member of the Board of Directors of ArbitralWomen. Since 2019, Katherine has been recognized by Who's Who Legal as a Future Leader in the categories of both Construction and Arbitration, highlighting her ""skillful handling of complex construction disputes"" and describing her as ""an excellent advocate, who is extremely dedicated to her cases"", as ""brilliant counsel in the field of construction arbitration"" and as ""a top-notch construction lawyer for all advisory matters"". Since 2021, Katherine has been recognized by LMG Expert Guides as a Rising Star in International Commercial Arbitration. In 2022, Katherine was recognized by The Legal 500 as a Key Lawyer for Dispute Resolution in Switzerland. In 2023, Katherine was recognized by Who's Who Legal among a very small number of Thought Leaders Global Elite – Under 45 in Construction."
"Katherine Bell is a Partner in Schellenberg Wittmer's Dispute Resolution Group and heads the Construction Practice Group in Zurich. Her main areas of practice are domestic and international litigation and arbitration. She advises clients front-end to back-end on complex construction and infrastructure projects and specializes in the resolution of disputes arising out of complex construction, engineering and infrastructure projects across a variety of industries. In addition, she represents clients in disputes in connection with commercial tenancy and lease agreements. She acts as counsel and arbitrator in arbitral proceedings and represents parties in litigation proceedings before Swiss courts. In addition to her disputes practice, Katherine regularly advises clients on public procurement matters, contract drafting and negotiation, contract and claims administration and dispute avoidance. Katherine is a lecturer on Construction Law at the Campus Sursee Educational Centre for Construction. She is a member of the editorial board of Construction Law International (CLInt), the magazine of the IBA International Construction Projects Committee. She is also a member of the Board of Directors of ArbitralWomen. Since 2019, Katherine has been recognized by Who's Who Legal as a Future Leader in the categories of both Construction and Arbitration, highlighting her ""skillful handling of complex construction disputes"" and describing her as ""an excellent advocate, who is extremely dedicated to her cases"", as ""brilliant counsel in the field of construction arbitration"" and as ""a top-notch construction lawyer for all advisory matters"". Since 2021, Katherine has been recognized by LMG Expert Guides as a Rising Star in International Commercial Arbitration. In 2022, Katherine was recognized by The Legal 500 as a Key Lawyer for Dispute Resolution in Switzerland. In 2023, Katherine was recognized by Who's Who Legal among a very small number of Thought Leaders Global Elite – Under 45 in Construction."