As a coach, Frick got Vaduz promoted in 2020. After moving to Luzern in 2021, he helped the club avoid relegation.
Aberdeen have appointed former Liechtenstein striker Mario Frick as head coach.
The 52-year-old left Luzern in the summer after five years at the Swiss club, the BBC reported. He was capped 125 times by Liechtenstein.
Aberdeen did not disclose his contract. He takes over a side with three wins from 12 Premiership matches this season.
That record is the immediate task. The club has turned to Frick for what it called the next chapter, after another managerial search following the Robinson reign.
The club said it had been looking for the right person to lead Aberdeen forward and was convinced Frick had the qualities, character and vision to make a real impact.
"He was also exceptionally well regarded by the many people across the game we consulted during the process, and the board was unanimous in its belief that he is the right person to lead Aberdeen forward,"the club said.
Aberdeen said Frick"has built a strong reputation for transforming teams, handing top-flight debuts to more than 30 academy players during his coaching career.".
As a player, his clubs included FC Basel, FC Zurich, St. Gallen and Grasshopper.
His 16 international goals make him Liechtenstein's all-time top scorer.
The length of his deal remains private as he begins work with a squad that has won only three of its 12 league games this season.