Soon after completing his master's degree in 2006,[2] Kuruvilla got hired by the Brookfield Police in Brookfield, Illinois the same year, making him the first Indian-American to do so, and worked as a civilian crisis worker with the Brookfield Police Department before becoming a police officer. He stated that coming from an immigrant family, "police work was not something on the radar as an option growing up" as he didn't know anyone in law enforcement. He further stated that he considers his educational background an "invaluable asset" to law enforcement.[1] He said, "But seeing where law enforcement and the Brookfield Police Department are headed, I quickly found that my passion for the work has grown over the years."[2] He later became a deputy chief.[2]
In September 2020, Kuruvilla, then aged 37, was awarded a "40 Under 40" award by the International Association of Chiefs of Police.[2][3]
On July 12, 2021, Kuruvilla took over the post of chief of police of the Brookfield Police Department, making him the first Indian American, first Malayali, and the first person of South Asian descent to hold the post.[2][1] Edward Petrak, the acting Police Chief, recommended Kuruvilla to Timothy Wiberg, the Brookfield Village Manager, who approved Kuruvilla's candidature for the post, and stated that "fifteen years is plenty of experience to run a department. He’s been successful at every level. He's ready for it."