 For four years, Feltes managed the staff, casework and grants under the Housing Justice Project.In 2013, Feltes received the Robert E. Kirby Award of the New Hampshire Bar Association, awarded annually to a New Hampshire attorney 35 years old or younger who demonstrates the traits of civility, courtesy, perspective, and excellent advocacy 

In 2014, Feltes ran for the state senate seat being vacated by Sylvia Larsen, and won.Larson backed Feltes's opponent in the Democratic primary, while other local Democratic leaders backed Feltes.