Police Scotland is becoming increasingly concerned about 58-year-old Alan Galbraith, who was reported missing by his family on Sunday 5 February 2017.
After spending Saturday evening with his wife and friends at a friend's house, Alan was last seen around 0200 hours on Sunday 5 February close to the old abattoir on Dundonald Road, Kilmarnock.
He then failed to return home or to attend his work in Glasgow on Monday morning.Specialist search officers have been examining the local area with assistance from the dog branch and air support unit. Specialist officers from the Police Scotland Underwater Unit have also been involved in searching for Alan.
Uniformed officers have been following up enquiries with all known acquaintances to try and piece together where he may have gone following the last sighting.
Alan is described as: white, around 6ft tall, stocky build and is bald with grey hair at the back and sides. When he was last seen, he was wearing a blue 'Northface' fleece, blue trousers and tan-coloured boots.
Chief Inspector John Cairns said: "From speaking with Alan's family and friends, this is completely out of character and he normally keeps in regular contact. The weather has turned making it very cold at night and we are very concerned that he could have fallen or taken unwell. We are continuing to search areas close to where he was last seen and we are following up any leads with his family, friends and acquaintances.
"His family just want to know that he is safe. I would urge anyone who has information on Alan's whereabouts to contact Police via 101. I would appeal to Alan to get in touch with his family, friends or with police as I am becoming increasingly concerned for his safety.
"Alan normally drives to work in his car and doesn’t use public transport regularly but people may recognise him in the Kilmarnock area. If you have any information on his whereabouts, please get in touch with officers at Kilmarnock police station via 101."
Call 101 for non-emergencies and general enquiries, in an emergency call 999. If you have information about a crime you can also contact Crimestoppers anonymously on 0800 555 111.