Boyce, 33, said he was delighted to return to Adelaide.
“I am so excited to get back to where my Big Bash journey started,” Boyce said. “I loved my time at the Strikers and am thrilled to be back. For a tournament that has only been around for 12 years, experience is extremely valuable, and I am relishing the idea of working alongside the likes of Travis Head and Alex Carey this summer.
“I have great relationships with a lot of the guys already and am looking forward to doing all I can to help bring another title to Adelaide Oval.”
“We are extremely pleased to have Cameron returning to the Strikers,” Gillespie said. “He will bring a wealth of experience and expertise to our squad.
“Cameron is a proven Big Bash performer, with a BBL title just one part of a prolific career highlighted by a huge number of wickets. We look forward to welcoming Cameron to Adelaide and back into the Strikers family.”