UPDATE: Esperance Police advised this evening, Sunday, November 17, that Mr Brown had been located safe and well. They thanked the community and wonderful SES volunteers for their assistance.
EARLIER: Esperance Police are calling for assistance to locate a 42-year-old road train driver after he was reported missing by abattoir staff this morning, Saturday, November 16.
Police have been searching for Queensland man Michael Paul Brown since 9am.
He is bald and is believed to be wearing clothing associated with the transport industry.
Mr Brown was last heard from at about 11.40pm yesterday, Friday 15 November 2019.
It is believed his last known location was the Coolgardie-Esperance Highway near the abattoir in Shark Lake, Esperance.
Esperance Police sergeant Ben Jeffes said a road train arrived at the abattoir from the eastern states once a week, disassembled and met abattoir staff the next morning to unload the truck, before departing back across the Nullabor.
However, this morning, staff arrived to find the truck parked and disassembled but they couldn't find the driver.
Sgt Jeffes said none of the staff saw him this morning and police had concerns for his welfare.
"We've been searching since 9am this morning," he said.
"So far we haven't found any evidence of him but the search is going to continue throughout the day."
A police and SES search is underway of buildings, paddocks and bush with a combination of all terrain vehicles and foot searches around the abattoir site about 25-30 acres in size.
Anyone who has seen Mr Brown or has any information regarding his whereabouts is urged to call the Esperance Police Station on 9079 8999 or to call police on 131 444.
Sgt Jeffes thanked the SES volunteers for their help in the search.