Sebastián is an lawyer from Universidad de los Andes, with a specialization in Labor Law from Pontificia Universidad Javeriana. He brings robust experience in labor and social security law, with a strong focus on collective labor relations and strategic human resources advisory.

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His practice includes advising national and multinational companies on union relations, collective bargaining, labor litigation, administrative proceedings, and immigration matters. He regularly supports management and HR teams on issues such as reinforced job stability protections, contract structuring, compensation and benefits plans, payroll settlements, retirement schemes, and the design of strategic HR policies.

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Sebastián has led numerous collective bargaining processes across diverse sectors, including insurance, healthcare, consumer goods, private security, and the palm oil industry—earning recognition for his ability to navigate complex negotiations and deliver balanced, business-oriented outcomes.