Nuestra Empresa - ISA

Organizational Structure

Led by the Board of Directors, ISA's organizational structure is divided into departments and management areas for each business area, which aim to achieve the objectives established in the General Shareholders' Meeting.

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Bernardo Vargas Gibsone

Mr. Vargas is the CEO at ISA. ISA is a leading multi-latin company based in Medellin, Colombia, focusing on four different businesses: Electric Power Transmission; Telecoms; Road Concessions; and Management of Real Time Systems where it acts as an independent system operator for the Colombian electric power system. Founded in 1967, ISA operates through 33 affiliated companies in 9 countries in Latin America and more than USD12 billion in assets as of year end 2014.

Previously, Mr. Vargas was founding partner of Nogal Asesorias Financieras, an investment banking advisory boutique in Colombia specializing in local and cross-border M&A. During his more that fourteen years at Nogal, Mr. Vargas led multiple transactions in sectors such as agroindustry, pharma, autoparts, paper and packaging, mining, oil and energy among others.

He has been Director at several Boards in both for profit and non for profit corporations and foundations, such as: ISA S.A. E.S.P , Amarilo S.A. and The Pantaleon Group Inc. Also Best Buddies Colombia, Lumni Colombia among others.

Before founding Nogal in 2001, Mr. Vargas was managing director at ING Barings where he headed the corporate and investment banking operations in Colombia. Mr. Vargas joined Baring Securities in 1994 as Head of Colombia and was subsequently appointed as President and CEO for the merged operations of Barings and ING Colombia on January 1997.

Before Barings, Mr. Vargas was founding CEO of Proexport Colombia, the nation’s export promotion agency; Founding CEO of Fiducoldex a local trust bank affiliated to Bancoldex. He also acted as Advisor to then Minister of Foreign Trade, Mr. Juan Manuel Santos, now President of Colombia.

Previous to that he was Head of the External Financing and Foreign Reserves Department at the Colombian Central Bank (Banco de la República). In this position Mr. Vargas was responsible for managing the portfolio of Colombia’s foreign reserves.

Mr. Vargas obtained an MBA from Columbia University and an Economics BA and MS candidate from Universidad de Los Andes, in Bogotá, Colombia

Cesar Augusto Ramírez Rojas

Chief Operations Officer. He received his electrical engineering degree from the Universidad Nacional de Colombia. He has a graduate certificate in Quality Management from Universidad EAFIT and a master's of science from U.S. Strathclyde. He joined ISA in 1980, and his last few positions were as follows: Chief Administrative Officer, Corporate Strategy manager and lastly, President of ISA's affiliate CTEEP in Brazil.

Carolina Botero Londoño

Business Administrator of the College of Advanced Management Studies (CESA) and Master of Finance in International Banking, she has more than 16 years of experience as an Investment Banker in the most important investment banks, both locally and nationally. The Clinton Foundation and Frisby have been his most recent work experiences.

Carlos Humberto Delgado Galeano

Chief Talent Officer. Carlos Humberto is a lawyer, with a Business Law specialization and a broad expertise and knowledge in human talent management. With a High Management program, he has successfully managed topics such as individual and collective relations, negotiations with unionists, leadership development and high level critical talent, organizational culture development and change management; always aiming at contributing with the profitable development and growth of the business and the generation of excellent work environments. He worked at ISA between 2006 and 2008 as Chief Talent Officer. Then he worked for Sumicol, as Human Talent Manager, where he stayed for almost 8 years.

Sonia Margarita Abuchar Aleman

Chief Legal Officer. She received her law degree from Universidad Pontificia Bolivariana de Medellín, where she also undertook studies in a graduate certificate in Administrative Law and Business Law. Since 1995, she has worked in the electricity sector, initially as a legal advisor with the Electricity Generator URRÁ S.A. E.S.P., and in October 2000, she joined ISA as a legal advisor to its Wholesale Energy Market Management. In 2004, she was promoted to become the Director of Regulation and Law Department in ISA's Market Operation and Administration Management. After that, she was transfered to the Company XM S.A. E.S.P. where she worked as General Counsel until December 31, 2013 because of an employer substitutio.

Juliana Suso Jaramillo

Chief Institutional Relations Officer for ISA since September 2020. Bachelor of Science in Business Management with emphasis on Marketing from Methodist University, North Carolina. Juliana has more than 20 years of experience in leading roles for multinational companies of the U.S. and Europe including commerce, marketing, communications, corporate affairs, and public policy advocacy. In 1995 she served as Marketing Coordinator for Colombia and Ecuador at Merck Colombia S.A. Then, she spent three years in the United States, North California, where she studied Business Management while working as Marketing Coordinator at the same University. Back in Colombia, she joined Bayer S.A. where she held several positions such as New Products Manager, Product Manager, Line Coordinator, and Regional Brand Manager. In 2003 she joined WYETH INC holding the positions of Pediatric Unit Commercial Director, Business Manager, and Women's Health Products Manager. Then, she joined PFIZER LTDA as General Manager Colombia, also managing Ecuador during the last months there. In 2011 Juliana also worked in the Tourism sector as General Manager at Tour Vacation Group, and in 2013-2014 she worked for the Colombian Government as Head of Staff and Strategic Director in the Office of the High Presidential Counsel for the Regions, for President Juan Manuel Santos. After this period, Juliana served as Senior Leader of Corporate Affairs and Communications at AMGEN INC. Finally, before taking over the Chief Institutional Relations Office at ISA, she worked as Chief International Relations and External Affairs Officer at UNITED HEALTH GROUP. Additionally, since 2019 Juliana was called by President Iván Duque and Vice President Marta Lucía Ramírez to be part of the Presidential Advisory Council of Colombian Businesswomen, an entity that guarantees the participation of women in relevant economic matters of the country.

Olga Lucía López Marín

Chief Information Officer. She received her Systems Engineer degree from Universidad EAFIT, and obtained an MBA from Universidad Tecnológico de Monterrey. She joined ISA in May of 1989 as a Professional Analyst and was a level I, II, III Specialist in IT Planning, and later was the Coordinator of IT Engineering Team. In 1996, she was named IT Director of ISA's Administrative Office. She held this position until December of 2013.


Olga Patricia Castaño Díaz

Office Strategy Officer. She received her Corporate Administrator degree from Universidad de Antioquia and was involved in several research projects there. She carried out her MSC Operational Research master's in Lancaster, England. She joined ISA in 1998 as an Employee and Organization Development Analyst. She was an Organizational Development Executive, and a Corporate Planning Executive. In November 2010, she worked as the Corporate Management Manager at Intervial Chile, an affiliate of ISA. Before she was named as VP of Strategy. she was in charge of the ISA Strategic Up-date Project.

Daniel Isaza Bonnet

Chief Business Development Officer, Business Administrator of CESA, Colombia. Economist of University of Western Sydney, Australia. Before linking to ISA, he was appointed Financial Structuring and Executive Director for the Metro de Bogotá Company. He was Founding Partner and Managing Director Colombia of Ágora Banca de Inversión and Rothschild Manager Colombia.

Daniel Isaza Bonnet

Chief Business Development Officer, Business Administrator of CESA, Colombia. Economist of University of Western Sydney, Australia. Before linking to ISA, he was appointed Financial Structuring and Executive Director for the Metro de Bogotá Company. He was Founding Partner and Managing Director Colombia of Ágora Banca de Inversión and Rothschild Manager Colombia.

Carlos Ignacio Mesa Medina

Chief Audit Officer. Financial Manager from Politécnico Jaime Isaza Cadavid and Systems Audit Specialist from Universidad EAFIT; he is an ISACA- Certified Information Systems Auditor – CISA. He has served as Internal Control Professional, Internal Audit Sub-director and Business Management Audit Manager at Empresas Públicas de Medellín –EPM; this last position held since 2013.