Josiah performs regularly in and around his home base of Salt Lake City, Utah at venues such as the University of Utah Libby Gardner Concert Hall, the University of Utah Fine Arts West Building, Utah State University's Chase Fine Arts Center, the Pearl, Alibi, the Green Room, the Capitol Theater, Caputo's Market & Deli, Hopkins Brewing Company, and on campus at the University of Utah. He has also performed and toured extensively in New York, South Florida, South Texas, California, and Europe, where he has performed at venues such as Jazz Club Torino and Le Ginestre Jazz Club in Turin, Italy; the Galerie Depardieu in Nice, France; and CinemaPRO in Bucharest, Romania.​

New York performances include appearances at venues such as the Jazz Gallery, the 55 Bar, Rockwood Music Hall, the Firehouse Space, Trinity Wall Street, the ShapeShifter Lab, NuBlu, Zinc Bar, the Triad Theater, Somethin’ Jazz Club, The Shrine, Silvana, Caffe Vivaldi, the Porch NYC, and Club Bonafide. In New York, Josiah has performed with artists such as Drew Gress, David Binney, Wayne Krantz, Ari Hoenig, Donny McCaslin, Dan Weiss, John Escreet, Jacob Sacks, Fima Ephron, Jonathan Crayford, Obed Calvaire, Will Vinson, Matt Brewer, Ben Wendel, Eivind Opsvik, Ferenc Nemeth, Alan Ferber, Brad Mason, John Daversa, Kenny Wollesen, the Gil Evans Orchestra, Mark Egan, Lew Soloff, Miles Evans, Mike Clark, Gil Goldstein, Yana Bibb, Jerry Watts, Nir Felder, Andrea Veneziani, Alessandro Fadini, and Massimo Biolcati.​

In Miami, Josiah has performed with a variety of artists including Mark Farina, Dave Liebman, Dave Holland, Nick Smart, Diane Schuur, Dave Grusin, Arturo Sandoval, John Faddis, Jimmy Heath, Ignacio Berroa, John Beasley, the New York Voices, Tom Scott, Cyrille Aimee, Dafnis Prieto, Gonzalo Rubalcaba, Will Downing, John Daversa, Errol Rackipov, Svet Stoyanov, John Yarling, Kate Reid, Melvin Butler, Steve Miller, Jimmie Vaughan, Mike Flanigin, Brianna Thomas, David Ake, Chuck Bergeron, the South Florida Jazz Orchestra, Janis Seigel, and Shelly Berg. In South Florida, Josiah has performed at the Adrienne Arsht Center for the Performing Arts, Jazz in the Gables, Jazz at Jackson, the GroundUP Music Festival Miami, Lagniappe, Le Chat Noir, The Arts Garage, Ball and Chain, The Anderson, The Globe, Sunset Tavern, The Fish House, Coco Walk, The Standard, Pinecrest Gardens, Books and Books, Space Mountain Miami, the Open Stage, the University of Miami's Gusman Concert Hall, and The Breakers. In addition to in-person performances, Josiah has performed for live broadcasts on South Florida's public jazz radio station, 88.9 FM - WDNA, and the University of Miami's radio station 90.5 FM - WVUM.

Josiah has also performed in many of Los Angeles's premier venues, including the Valley Performing Arts Center, the Kodak Theater in Hollywood, the Wallis Annenberg Center for the Performing Arts, the Jazz Bakery, the Blue Whale, the Baked Potato, Catalina's Jazz Club, the Curve Line Space, and Vitello's. Additionally, Josiah has toured northern and central California. He has performed at the Monterey Jazz Festival (2010, 2011), the California Jazz Conservatory (formerly known as the Berkeley "Jazzschool”), the Bakersfield Jazz Workshop, the Bakersfield Jazz Festival (2005, 2006, 2007), the San Joaquin Valley Jazz Festival (2010), and the Pasadena Jazz Institute, among others.

In the Rio Grande Valley, Josiah has performed jazz and electronic music and given public lectures at the University of Texas Rio Grande Valley Performing Arts Complex, Dodici, the Brownsville Museum of Fine Art, the Texas Southmost College Performing Arts Center, Las Ramblas, Broken Sprocket, El Hueso de Fraile, Sidebar, Angelita's Casa de Cafe, and Bodega Tavern and Kitchen. As a painter, Josiah has had his visual artworks exhibited at the Brownsville Museum of Fine Art in Brownsville, TX. For those who missed it, Artropolis published an interview and virtual walk-through of the exhibition here.