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Brigard Urrutia

Guillermo Tejeiro

Guillermo Tejeiro



  • Environment and Sustainable Business
  • Renewable Energy and Energy Efficiency
  • Cannabis Law

WSG Practice Industries


WSG Leadership

Environment and Sustainable Business
Sustainability Group
Head of the Environment and Sustainable Business Team and member of the Renewable Energy and Energy Efficiency Team of Brigard Urrutia, Mr. Tejeiro holds a J.D and a Master's Degree in Law from the Universidad de los Andes (Colombia), an LLM in Environmental and Energy Law from K.U Leuven (Belgium), a postgraduate degree on Environmental Law from UFGRS (Brazil), and a postgraduate degree on Electricity and Gas Regulation from Universidad Externado de Colombia (Colombia).

Mr. Tejeiro advises national and international clients in matters related to sustainability of projects and activities, including the representation of clients in environmental litigation, advising on environmental tax benefits, and structuring projects and green business. Regarding renewable energy, Mr. Tejeiro advises national and international clients in connection with renewable energy and energy efficiency projects from a regulatory perspective, particularly environmental and electricity law.

He has served as legal counsel, researcher and lecturer in matters related to environmental law and renewable energy, occupying positions within NGOs, research institutes and law firms in Europe and Latin America. He is author of several publications in Colombia and abroad in environmental and renewable energy law and has been appointed as lecturer in several universities across Colombia.


Lawyer from Universidad de los Andes, he holds a master in Law from the same university. He also holds an LL.M. Programme in Environmental and Energy Law from Katholieke Universiteit Leuven – K.U Leuven and a postgraduate degree in Environmental Law from Universidade Federal do Rio Grande do Sul – UFRGS and a postgraduate degree in Electric Energy and Gas from Universidad Externado de Colombia.
Areas of Practice

Cannabis Law | Environment and Sustainable Business | Renewable Energy and Energy Efficiency

Professional Career

Professional Associations

  • International Bar Association

Professional Activities and Experience

Brigard Urrutia's associate, he joined the firm in August 2014. He worked as a law fellow of Liedekerke Wolters Waelbroek Krikpatrick in Brussels, Belgium, as well as researcher at the Center for International Environmental Law – CIEL in Geneva, Switzerland. Additionally, Guillermo served as legal advisor on international environmental law at the environmental boutique Trindade Lavratti Direito Ambiental and was appointed as Technical Coordinator of a research project at the Institute “Law for a Green Planet” in Porto Alegre, Brazil.

Ministry of Interior Makes Prevention Recommendations to Ethnic Groups
Brigard Urrutia, March 2020

The Ministry of the Interior issued Communication 015 of 2020, through which the Ministry set made recommendations for the prevention, containment, and mitigation of the coronavirus COVID19 in ethnic groups: indigenous peoples, the NARP communities (Black, Afro-Colombian, Raizales, and Palenqueras) and the PROM people...

WSG's members are independent firms and are not affiliated in the joint practice of professional services. Each member exercises its own individual judgments on all client matters.

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