Premier Cricket umpire Todd Rann will become the longest serving umpire in WA Premier Cricket history during this weekend's Round 7.

The 49-year-old veteran will clock up an astonishing 480 officiating matches, which include 20 Grand Finals in a career spanning 21 years.

"I first started umpiring when I was living in Broome during the 1993-94 season," Rann said.

"There were no umpires up there at the time, so I was playing and umpiring at the same time and took a bit of a shine to it.

"I came to Perth in 1995 and saw an advertisement for umpires in the paper, so I applied for the following season and it just went from there."

Being an umpire, no matter what the competition, is far from the most glamorous of jobs, however, Rann had his sights firmly set on officiating.

"I played cricket at school for Wesley College plus a few seasons at what's now known as Willetton Cricket Club, but I wasn't much of a player, so I don't think I was missed that much when I left," he said.

"I really enjoyed the challenge of umpiring when I first started and I still do now.

"Every game is different, anything can happen and the challenge of every new day keeps me coming back."

While Rann wasn't looking to break milestones at the start of his career, he admitted that once he finishes umpiring, it will be something he can look back on fondly.

"It's a bit surreal, to be honest, to have your name on top of that list" he said.

"I didn't really have any aspirations to break records when I first started, I just went out there to see if I was any good and it snowballed from there.

"Looking at the names on the list, there are a lot of legends amongst them that I know and respect, so once I stop and have a look back. it will probably sink in a bit more."

When asked what he felt set him apart from other umpires, Rann was typically modest, believing it was mainly his preparation that has put him in good stead for so many years.

"I don't think I'm that different to many of the other umpires, to be honest" he said.

"I think I've stood the test of time because if I don't know something, I always look it up to makes sure before I start the day's play.

"Good umpires are well prepared umpires and I think my preparation is something that sets me apart, so there's no surprises out there on game day."

The future for Rann, who has never been dropped from First Grade officiating during his 21-year career, still has umpiring duties on the horizon.

"I'm basically going to keep going," he said.

"I'm just going to enjoy umpiring as much as I can and pass on as much knowledge and support as I can to the new guys."