Chief Mann is the Turtle Clan Chief of the Ramapough Lunaape Nation, NJ-NY. Chief Mann has held the title of Turtle Clan Chief for approximately twelve years. For the past five years, he has
worked with the NYU Environmental Studies department. In that time, he participated in the construction and implementation of a community health survey focused on identifying and addressing health concerns within his community. Chief Mann has been at the forefront of the New Jersey environmental justice movement, where he has worked to protect the water supply of 4 million people and advocated for the community living in close proximity to the Ringwood mines superfund site. He and Clan Mother Michaeline Picaro Mann founded the Munsee Three Sisters Medicinal Farm in 2020.