In 1973, Lucas started teaching Italian and continues to do so.[4]
Lucas began teaching at Gallaudet University in 1981 and, alongside Robert Johnson and Scott Liddell, was one of the inaugural faculty to teach in the university's new linguistics graduate program. Lucas was a professor in the Department of Linguistics at Gallaudet University until her retirement in 2014.[2]
During her tenure at Gallaudet, Lucas served as principal investigator on two research projects in the field of sign language linguistics. The first of these was the large-scale project Sociolinguistic Variation In ASL (funded by the National Science Foundation Grant Numbers: SBR 9310116, SBR 9709522).The results of this study are summarized in the book Sociolinguistic Variation In ASL (Lucas et al. 2001). (Results of its pilot study are discussed in the introductory chapter of Sociolinguistics in Deaf Communities (Lucas 1995).) The second project became titled The History and Structure of Black ASL (funded by The Spencer Foundation and NSF, Grant Numbers: BCS-0813736, DRL-0936085).[5] The results of this study are summarized in the book The Hidden Treasure of Black ASL: Its History and Structure (McCaskill et al. 2011).