ESPO, aka Stephen Powers, is a contemporary graffiti artist and muralist currently living and working in New York City. He is widely known by the name ESPO which is short for "Exterior Surface Painting Outreach”. He is a key figure in the transition of graffiti writing into street art, first attracting attention under the name ESPO for his tags on the streets of Philadelphia. Powers moved on from graffiti in 1999, taking enamel on metal art into the studio and creating a practice that includes sign painting. One of his hallmarks is graphic lettering, which he often incorporates into his murals around the world. These murals are like love letters to the cities in which they reside.