Forester Reymark P. Rivera, RPF is a Filipino forester, educator, researcher, and extension specialist with expertise in forestry, agroforestry, environmental conservation, and sustainable natural resource management. He currently serves as a faculty member at Don Mariano Marcos Memorial State University–North La Union, where he teaches undergraduate courses in forestry and agroforestry while actively engaging in research, extension, curriculum development, and student mentoring. As an Extension Facilitator, he also leads community-based training programs and technical assistance initiatives that promote sustainable agriculture, forest management, and environmental stewardship among local stakeholders.

Forester Rivera earned his Master of Science in Agroforestry from Don Mariano Marcos Memorial State University and completed his Bachelor of Science in Forestry at Isabela State University. He is a Registered Professional Forester, having successfully passed the Forester Licensure Examination in 2019. To further enhance his professional competencies, he has completed specialized training in geographic information systems (GIS), spatial analytics, ecosystem service valuation, hydrologic modeling, landslide susceptibility analysis, reef monitoring, and environmental data analysis.

As an active researcher, Forester Rivera has authored and co-authored scholarly publications in reputable national and international journals, including Scopus-indexed publications. His research interests encompass sustainable forest management, agroforestry systems, biodiversity conservation, fiber morphology of forest species, Indigenous Knowledge Systems (IKS), community-based forest management, ecosystem services, flood susceptibility mapping, and climate resilience. His work contributes to evidence-based environmental management and supports the development of sustainable land-use practices and conservation strategies.

In addition to his research publications, Forester Rivera has led and participated in numerous research and extension projects focusing on cacao germplasm development, sustainable coconut production, forest species characterization, agroforestry technology promotion, and science- and technology-based community empowerment. He also holds a copyright for the "Inarching Technology Promotion for Rambutan," demonstrating his commitment to technology transfer and innovation in the agriculture and forestry sectors.

Beyond his research and extension work, Forester Rivera contributes to scholarly publishing as a peer reviewer for the International Journal of Research on Multidisciplinary Studies (IJROMS) and the DDOSC Multidisciplinary Research Journal, and as an Associate Editor of the Journal of Educational Research, Innovation, and Multidisciplinary Studies. He is likewise an Associate Member of the DOST–National Research Council of the Philippines and an active member of the Forest and Natural Resources Research Society of the Philippines and the Society of Filipino Foresters, Inc. Through his dedication to teaching, research, extension, and academic service, he continues to advance sustainable forestry, environmental conservation, and community development in the Philippines.