Justin has performed as Soloist in the following works:
- Carmina Burana (Orff)
- Chichester Psalms (Bernstein)
- Elijah (Mendelssohn)
- Fantasia, Op. 80 (Beethoven)
- Les Sept Paroles du Christ (Dubois)
- Mass in Blue (Todd)
- Mass No. 2, D 167 (Schubert)
- Melodious Accord (Parker)
- Messa da Requiem (Verdi)
- Missa in Angustiis (Haydn)
- Oratorio de Noel (Saint-Saëns)
- Requiem in D minor, K. 66 (Mozart)
- Requiem, Op. 48 (Fauré)
- The Armed Man: A Mass for Peace (Jenkins)
- The Crucifixion (Stainer)
- The Messiah (Handel)
Justin has worked with the following organizations:
- Bel Canto Lyric Opera of Philadelphia
- Boheme Opera NJ
- Glen Loch Men’s Chorale
- International Opera Theater of Philadelphia
- OperaPhiladelphia
- PhiloMusica Chorale
- Saint Mary's Choir of Saint Mary's Episcopal Church in Wayne, PA
- The Great Auditorium Choir in Ocean Grove, NJ
- The Kauriga Family Orchestra
- The Pennsylvania Ballet
- The Philadelphia Orchestra
- The Philadelphia Chorus
- The Philadelphia Singers
- The Philly Pops
- Valley Forge Chorale
Justin has worked with the following conductors and musical directors:
- Beatrice Jona Affron
- Jonathan Coopersmith
- Charles Dutoit
- Christoph Eschenbach
- Jeffrey Uhlig
- Paul Fejko
- Paul Fleckenstein
- Raquel Garcia
- Gary Gress
- David Hayes
- David Hobbs
- Mark Miller
- Peter Nero
- Joseph Pucciatti
- Corrado Rovaris
- Karen Lauria Saillaint
- Salvatore Scarpa
- Dr. Jason Tramm
- Dr. Gordon Turk
- Gayle Wieand
- Richard Zuch