Lars joined the Zondlo group in August 2020, after seven years working as a researcher involved in field work directly for the group as well at an RET with MIRTHE (Midinfrared Technologies for Health and the Environment). He has been involved with research campaigns including the Marcellus shale (methane), DISCOVER-AQ Colorado (methane and ammonia), wastewater treatment plant fugitive gas analysis sponsored by the Alfred P. Sloane Foundation, and currently wastewater fugitive gas analysis in Chicago. Lars recently retired from 28-years as a high school physics where he taught all levels of high school physics. He has also been involved in mentoring undergraduates, most recently assisting with a study of nitrous oxide emissions from surrounding waters nearby a wastewater treatment plant.