During his early years he applied himself to doing research in sports medicine with a specific focus on rehabilitation, high performance physical training, and working on preparing athletes in various disciplines.

During those years he had the fortune to work with three cubans who were ranked as the highest pitchers of Cienfuegos baseball team.

The players were Adiel Palma, Norberto Gonzales, and Yosvani Perez, all of them were pitchers of the National Baseball team who became Olympic and World Champions.​

• Teaching background.

• 1998 - 2001: Member of the Scientific Committee of the sports medicine Center in Cienfuegos. Jury in different scientific events of Sports Medicine and in the institute of Physical Culture and Sport.

• 1995-2001: Adviser on strength and power work: regional teams  of Baseball, Weightlifting, Athletics, Rowing, Soccer, Volleyball, Swimming, Basketball and Cycling among others.

• 1992-2001: Teacher guide of 12 thesis students in the faculty of physical culture and sport. University: Carlos     Rafael Rodriguez. Cienfuegos, CUBA.  Research on Exercise Physiology, Sports Rehabilitation and Physical Preparation.​

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Due to his  professionalism, efficiency and dedication, Duglas Cordero is a recognized professional in the Viña del Mar, City. Specially thanks to his several  achievements preparing and rehabilitating top national athletes. He worked in the city of Viña del Mar for eleven years. He was member of the Chilean Society of Sports Medicine. He has worked in several clinics, the most important ones to be mentioned are: Cuban Medical Center (SEMEFIC) – Medical Center (COMIN) and Research Center and Sports Rehabilitation.