Mr Mepham will go head to head with 2015 New Zealand excavating champion and Gair Contracting project manager, Steve Galbraith.
"I drive a digger every day, so I am familiar with the machinery but new to the task."
The machine operator, who has been working for the company for five years, hopes to improve his work and keep going in the industry.
"I want to work on what I'm doing and move into a more managerial position."
In second place was Bart Mulder, owner of Pro Arbore and third place was given to Adam Saunders from Downers NZ.
Gair Contracting general manager Richard Jardine was proud of the achievement.
"It is real important to lift the image of our business. We get to show people that we have got the top operators working for our company."
The earthworks company also won the Image award.