Kennedy, who is one of 19 players in contention for selection in the Great Britain and Ireland team to play the United States of America in the Walker Cup Match at the Old Course in September was deftly guided around the Lancashire links course that has hosted 11 Open Championships by Sunneson, who enjoyed a 14-year partnership with Nick Faldo that yielded six major titles.
After carding a bogey-free 68 on Saturday, the 17-year-old took a four-shot lead into the final round over James Ashfield of Cheshire and completed his title run with a 2-over round of 72 on Sunday.
It was Kennedy's second win in the last 14 months, following his impressive victory at the Portuguese International Amateur Championship in February of 2022, when he set a 72-hole scoring record for the championship at 19-under en route to a wire-to-wire four-stroke victory.
Kennedy will learn his Walker Cup fate in August when the 10-man Great Britain & Ireland team is announced by the Royal & Ancient and GB&I captain Stuart Wilson.