The Spanish manager was sacked by Everton last week.
Martinez's three-year reign at Goodison Park came to an end last week, with the Toffees 12th in the Premier League table which, given their squad, is perhaps a symptom of their underachievement under the former Wigan manager.
In addition to that, Everton were also eliminated from the FA Cup at the semi-final stage, losing 2-1 to Manchester United at Wembley following a last-minute winner from Anthony Martial in an incident which nudged him closer to the exit door on Merseyside.
During his time in England, Martinez has established himself as one of the best young managers on the scene, and Unsworth, whose role at the club was developing younger players at the time of the 42-year-old's dismissal, says his friend won't be long out of work.
"I saw Roberto [on Friday morning] and we had a big hug. He's fine and he'll go off and recharge his batteries, and I'm sure he'll be in a top job very, very soon," he said via Soccerway.
If Unsworth had designs on the full-time job, he went the right way about it as Everton smashed Norwich City 3-0 at Goodison Park on the final day of the season on Sunday.