Newcastle-bound Ian Cathro says he is 'incredibly excited' about his new role.
McClaren was appointed Newcastle boss earlier this month, arriving as John Carver's replacement in the St. James' Park dugout.
The former Derby boss is expected to reverse Newcastle's fortunes after another dismal season on Tyneside, but will need to establish a coaching staff around him.
The Chronicle reported last week that Scottish coach Cathro is set to become McClaren's assistant having recently left Spanish giants Valencia, with the 28-year-old returning to Britain after spells in Portugal and Spain.
A highly-rated coach due to his youth, Cathro is set for Newcastle - and spoke to The Sun about his impending move to the North East.
Cathro said that he's 'incredibly excited' to join Newcastle, and believes that working alongside McClaren will help prepare him for life as a manager in his own right.
"This is something that can only prepare me even better for when the time comes," said Cathro. "I’m incredibly excited by it and I just want to help out in any way I can. I wanted the challenge of working in a different league and English football is very different from Spanish football."
"I’m also looking forward to working at a club which genuinely wants to push itself and grow; and to get back to a real level of competition. Steve has worked abroad himself. He is an incredibly experienced coach and manager, and an impressive man generally. I know I will learn a lot from him," he added.
Cathro is just 28, so should be in no rush to become a manager at this stage in his career. By working in Portugal, Spain and now England, he's able to sample different styles of football and work with different managers to take influence from them to become a boss later on.
Some may feel that Andre Villas-Boas went into management too soon, so Cathro should take his time, learn from McClaren and then look to become a manager in the future - possibly even at Newcastle if he impresses as assistant manager.