Siaska SSS Lorenzo

Managing Partner, Panama


  • Siaska has broad experience in Labor Law, Data Privacy, Competition and Compliance, Telecommunications, Energy and Infrastructure, Concessions, Public Bids and Privatizations, as well as Administrative Law; she has experience in Anticorruption and Corporate matters advising local and multinational companies.
  • She was Partner for 21 years in a renowned firm in Panama and was in charge of supervising all the governmental procedures and negotiation formalities, collections inside the Litigation department and exercised as adviser of foreign investors in the main processes of privatization in the areas of energy, water, sugar, cements, among others.
  •  In Telecommunications, she directed the group in charge of drafting the General Law of Telecommunications of Panama and its Regulation Decree in 1995, still binding. 
  • From 2005 to 2009 she was the first female Editor-in-Chief for the national newspaper La Prensa, the one with the largest impact on the Panamanian national and political agenda. After her career in the newspaper, she went back to private practice, opening the Arias Panama office in 2011. She has been the Managing Partner since 2016.


  • Bachelors Degree in Law and Political Science (summa cum laude) from Universidad Santa Maria La Antigua (USMA) of Panama, First Honor place.
  • Masters Degree from Harvard University (LL.M) 
  • Neutral Arbitrator for the International Centre for Dispute Resolution of the American Arbitration Association (AAA-ICDR), Miami-Florida, USA.
  • Certified Arbitrator for NAM (National Arbitration & Mediation), New York, USA.
  • Certified Arbitrator for the Panamanian Chamber of Commerce.
  • Certified Public Translator English/Spanish.

  • Highly Regarded Leading Lawyer by IFLR1000 - 2022
  • Listed in Whos Who Legal by her practice in Administrative and Public Law, and Data, Telecoms and Media.
  • Listed as one of the 39 most influential woman in Central America by “El Economista” August - September 2018.


  • International Bar Association (IBA)
  • Panamanian Bar Association

Her rol in the community

  • Siaska collaborates with the "Maestro en casa" program, which focuses on the literacy of adults living in the most in need communities in the interior of the country, through Radio Education of the ONG Institute for Radio Education (IPER) )
Client's feedback

  • With over 30 years' experience in administrative law, Siaska Lorenzo cements her place as a go-to practitioner with expansive knowledge of public bids and labour issues. – Who’s Who Legal
  • Siaska Lorenzo receives considerable praise for her first-rate regulatory advice to clients operating in the telecommunications sector. – Who’s Who Legal
  • Siaska SSS Lorenzo has over 30 years of experience in telecom, competition and labour law, where she excels assisting clients in privitisation and litigations. - Who's Who Legal 2022.

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