Buckley won the title after showcasing his latte art skills, creating a signature drink and performing a 10-minute routine, which saw him make six hot beverages against the clock.
Tim Sturk, head of coffee training and development at BaxterStorey, said: “This year, the BaxterStorey Barista Championships have welcomed more talented people than ever before, with over 50 of our baristas pitting their skills in a bid to be named as the winner.
“Few people understand the true complexities of creating excellent coffee – the bean to cup journey is certainly not an easy one – but Derek has demonstrated immense skill throughout this competition.
“He has proven himself to be one of our industry’s best baristas and a deserving winner of our 2015 Barista Championships.”
Buckley will now go on to compete in the UK Barista Championships 2016.