Campbell took over the role from current player Dean Moon ahead of the 2017 and has helped turn the Eagles into one of the Murray Football League's premier clubs.
And the 2013 premiership player said re-committing to the club was a simple decision.
"I'm looking forward to continuing to develop the players we have at the club," Campbell said.
"Looking back it's great to see how the club has been able to come along so quickly. But it wouldn't have come without hard work from a lot of people.
"At the end of the day, I just play a small role in the football club. My job has been made easier by the fact we have formed a core group who want to help push us forward.
"I'm extremely lucky to have great support behind me to help the club move towards the success they desire."
Club president Lucas Walker echoed Campbell's sentiments that the club had come to an easy decision.
"Having stability is critical to a football club," he said.
"It's always pleasing when you can have a familiar face because it makes for a settled environment from players to officials.
"The club are lucky to have someone with Guy's experience and we're glad we can continue moving forward as a club."
While the Eagles have appeared in the finals series in each of Campbell's first three years in charge, he admitted he had learned that patience was the key to the job.
"At the start I wanted more," Campbell said.
"But you quickly realise that it does take time to build towards something special. We saw that on Saturday when we had every football and netball team playing in a final.
"I've never seen anything like it and I'm glad I was able to be apart of it."
While Campbell is strongly focused on bringing senior success to the club, he is just as intent on bringing through the next generation of stars.
"If our juniors warrant selection they'll get the opportunity to play," he said.
"We want to put sustainable methods in place which can hold the club in good stead for the long-term.
"But it just isn't about these kids as footballers making the transition between the junior and senior ranks.
"We want to see them become good people outside of the club. Our goal is to help them make the switch between school and adult life.
"If we can do that I think we as a club can say we've done our job."
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