The pair began working together when the world number four was 11 and Smith oversaw Murray's progress to the top of the junior game and his first forays into the senior ranks.
The relationship continued while Murray was at the Sanchez-Casal academy in Barcelona and Smith was courtside when his fellow Scot won the US Open junior title in 2004.
After a flurry of negative publicity following the Lithuania defeat, which included a parliamentary investigation, the LTA will be desperately hoping Smith can persuade Murray to play against Turkey this summer.
Murray, 22, chose to skip the last tie amid a degree of acceptance that his team-mates must first prove themselves up to the task before he returns.
But defeat by Turkey and descent to a tier that includes the likes of Andorra, San Marino and Montenegro is simply unthinkable - although, without Murray, certainly not impossible.
For Smith, the appointment caps a swift rise through the coaching ranks. He began his career at the age of 18 and worked at a number of clubs in Scotland before linking up with Murray.
Smith became academy coach for Scotland in 2002 and was promoted to national training coach two years later.
He joined the LTA three years ago as national under-16 men's coach, moving up to coach the Under-18s in 2008 before taking up the role of head of player development for men's tennis last year.
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