Mobley has performed with the Baroque ensemble Apollo's Fire, and is a regular guest with the Philharmonia Baroque Orchestra, the Washington Bach Consort, Seraphic Fire, and Agave Baroque. With the latter, Mobley created the project Peace in our Time – music of love and loss in the shadow of the Thirty Years’ War, which included concerts for the San Francisco Early Music Society and a new recording.[7] Mobley also recorded a collection of spirituals with Agave Baroque entitled American Originals that was nominated for a 2022 GRAMMY Award. His first solo album, in May 2023 is also a selection of spirituals, performed in collaboration with pianist Baptiste Trotignon, entitled Because.[8]
Mobley has also taken roles in several musical theatre productions, including the title role in Rupert Holmes' Mystery of Edwin Drood, and Jacey Squires in Meredith Willson's The Music Man. In addition he has performed many cabaret shows and sets of jazz standards and torch songs in jazz clubs in and around Tokyo, Japan.[4]
Mobley holds the position of visiting artist for diversity outreach with Apollo's Fire.[9] He has a strong interest in researching and performing the work of forgotten black composers,[10] particularly Ignatius Sancho.[2]
In 2019 he collaborated with composer Jonathan Woody in developing and performing a choral piece entitled Nigra Sum Sed Formosa: A Fantasia on Microaggressions.[11]
In March 2020, he became the first-ever programming consultant for the Handel and Haydn Society, working to diversify the group’s repertoire. The job evolved from his earlier annual projects with the group, beginning with organizing a 2015 program along with the Museum of African American History in Boston.[6]