Johisner Penagos Llanos is a Colombian Ph.D. student in Chemistry at the University of Santiago de Chile, specializing in developing electroanalytical sensors. His research focuses on utilizing screen-printed carbon electrodes modified with nanomaterials for the detection of various elements in aqueous and food matrices. With a background in Professional Chemistry from the University of the Amazon, Johisner has a solid foundation in research, as evidenced by his thesis on developing an electrochemical sensor for detecting dopamine.In addition to his academic pursuits, Johisner has practical experience in laboratory management and environmental analysis, having worked in various roles in the industry. He has also contributed to the field of education as a chemical processes instructor, demonstrating his commitment to sharing knowledge and expertise. Johisner’s dedication to his studies and professional development is evident in his participation in supplementary courses, which have further enhanced his skills in pedagogy, laboratory management, and computer literacy.