Lecturer at the Faculty of Public Health, Universitas Sumatera Utara, a functional position as Head Lector. The focus of the field of interest is Environmental Health Risk Analysis and Environmental Health Epidemiology. Previous research: Study of the effect of oral Cadmium intake on the occurrence of Parkinsonism symptoms in the community around the Namo Bintang landfill, Pancur Batu Sub-District, Deli Serdang District, Risk Analysis of three heavy metals, namely mercury, lead, and chromium in water wells belonging to the people who live around the Medan Falls TPA, Risk Analysis on Potential Pesticide and VOC Pollution in the Berastagi Watershed, Study of the dominant factors that influence the incidence of malaria and alternatives to control in Bogak Village, Suka Maju Village, and Bagan Dalam Village, Tanjung Tiram District, Batubara District, North Sumatera Province, Study of the Potential of Coastal Ecosystems as a Habitat for Malaria Mosquito Larvae and Alternatives for Their Control in Simandulang Village, Tanjung Leidong Village, Kualuh Leidong Sub-District, North Labuhan Batu District, and Environmental Risk Analysis Study of PT. Toba Pulp Lestari (PT. TPL) Tbk in Toba District, North Sumatera Province.