Kajahl was born and raised in Santa Cruz, CA. In the fall of 2008, he received a BFA from San Francisco State University and spent his final year studying at the Accademia di Belle Arti Firenze, Italy. In the spring of 2012, he received his MFA from Hunter College in New York City. Currently, Kajahl is an Adjunct Faculty member at the New York Academy of Art. His work is in the permanent collection of The Studio Museum in Harlem.

Through painting, Kajahl resurrects objects that are lying dormant in historical archives. He endlessly scours and sifts through books, online images and visits museums in order to gather source material. He takes these finds from his excavations and hybridizes entities that eventually become grandiose figures. Although the characters he constructs belong to a multiplicity of time periods, locations and cultures, they foreground the forgotten past and reanimate minor artifacts of history into what amounts to a transformative assemblage.