Katharyn began doing stand up comedy in New York where she worked her way to regularly hosting and performing nightly all over the city. She has been seen regularly at venues including but not limited to New York Comedy Club, Gotham Comedy Club, Broadway Comedy Club, The Grisly Pear, The Stand, and The Comic Strip as well as countless backs of bars, windowless basements, rooftops, and bathroom stalls.
Regarded as "hair-raising stand-up" by The Scotsman, Katharyn is currently based in London, and performs regularly at Top Secret Comedy Club, Vauxhall Comedy Club, Camden Comedy Club, and Up the Creek among other clubs, dives, and holes-in-the-wall on the circuit. Katharyn's project outside of stand up is co-hosting the podcast "This American Irish Life" with Mark O'Keeffe.