Lumay has over 30 years of leadership and technical experience in Exploration & Production, including exploration projects, field development, full life cycle project management. Lumay is well versed in upstream asset management, training and development of technical staff, technology development, and resources reserve planning and reporting, including guiding portfolio decisions and final investment decisions advisory. She has been involved in developing processes and technologies to ensure proper exploration and exploitation of oil and gas fields in Conventional and Unconventional Reservoirs.

Lumay has extensive experience in leading consulting organizations with deliverables to National Oil Companies, International Oil Companies, and Independents at a global and regional level. She has focused in the latest years on resources and reserves evaluation in exploration and field development onshore and offshore in field assets in the USA, Canada, México, Colombia, Ecuador, Venezuela, Brazil, Argentina, Europe, Malaysia, and China.