Since 2014, Vanderslice has been a full-time record producer at Tiny Telephone and has worked with Frog Eyes, Samantha Crain, the Mountain Goats, and Grandaddy. He has previously worked with Sophie Hunger, Bombadil, Strand Of Oaks, and Spoon.
Vanderslice is a proponent of using analog instruments and recording equipment to produce a richer, more raw sound which he has sometimes called "sloppy hi-fi". He has collaborated closely with engineer/producers in the production of his albums, including John Congleton, Scott Solter, and John Croslin.
Vanderslice was a contributing producer on the Spoon album, Gimme Fiction, and also produced The Mountain Goats albums Heretic Pride, The Sunset Tree, and We Shall All Be Healed. In March and April 2009, John Vanderslice toured alongside The Mountain Goats' John Darnielle in the "Gone Primitive Tour". These shows featured Vanderslice and Darnielle each playing acoustic sets and then performing material together.
Vanderslice has often chosen bands to tour with him who have gone on to widespread recognition and critical respect, including Sufjan Stevens, Okkervil River, The Tallest Man On Earth and St. Vincent.
His introduction from the Tiny Telephone website says: "Hello, my name is John Vanderslice. I've made records with tons of people, including The Mountain Goats, Cherry Glazerr, Grandaddy, Brothers Comatose, Spoon, and Sophie Hunger. I like to produce and engineer records. I usually record using analog tape machines and I play a few instruments as well. I own (and usually work out of) Tiny Telephone. Adam Katz of Next Wave manages me. I actually answer emails. Super fast and very easy to work with, I prefer intuition over agonized deliberation and performance to precision. Blame the Surrealists."