A frequent and enthusiastic performer of musicals, John has performed with Troika Entertainment's national tours of 42nd Street, West Side Story, and Legally Blonde: The Musical. He has also performed on the national tour of Disney's Mary Poppins and on more regional productions of The Addams Family, The Little Mermaid, Shrek: The Musical, Les Miserables, The Sound of Music, The Music Man, Bye Bye Birdie, Oliver, Ain't Misbehavin', Guys and Dolls, and several other productions at various theater companies such as the Wagon Wheel Theater in Warsaw, IN, and the Cumberland County Playhouse in Crossville, TN.
John is involved in an aggressive commissioning project with Tromboteam! Raising funds through private donations, a grant, and Kickstarter, nine new pieces for trombone ensemble were commissioned and performed in one epic concert. The success of this project led to performances at the 2014 Eastern Trombone Workshop and the 2014 International Trombone Festival, as well as featured speaking engagements at the Wilmette Rotary Club, the Levy Entrepreneur Group, and Valparaiso University's Music Industry course. The massive project culminated in 2016 with the release of a CD featuring this music.
John has performed as a guest artist at numerous colleges including: Potsdam Conservatory, Cornell University, Ohio University, University of Southern Mississippi, Converse College, Middle Tennessee State University, Indiana State University, Northern Illinois University, University of Nebraska at Kearney, and Valparaiso University. As a soloist, he presented Arthur Pryor's Thoughts of Love with the Valparaiso Community Band in 2013 and Blue Bells of Scotland with the Michigan City Municipal Band in 2014. John's wife, Dr. Ericka Tyner Grodrian, is a professional brass musician (horn) and pedagogue as well. Together they perform as a duo at recitals, weddings, and church services and are working to develop the horn/trombone repertoire further.