After making some playing appearances for amateur clubs, Aglietti switched to a coaching career, starting with a number of youth teams before taking charge at
Empoli in 2010. On 2 October 2011, he was sacked and replaced by
Giuseppe Pillon. On 12 February 2012, he was recalled by the same team as head coach until the end of the season. On 18 November 2012 he was named new coach of
Novara in
Serie B. He successively served as head coach of
Virtus Entella (Serie B) in 2015–16 and
Ascoli (Serie B) during the 2016–17 season. In November 2017, he made a comeback in charge of Virtus Entella. He was sacked from Virtus Entella on 7 May 2018, with the team in the relegation zone with two games to go. On 2 May 2019, he was named to replace
Fabio Grosso at the helm of Serie B club
Hellas Verona to help the club get into the promotion playoffs. Under his short tenure, he managed to guide the club to fifth place in the regular season, and then to the promotion playoff finals, where Verona defeated
Cittadella to achieve promotion to Serie A after only a single season in the second division. Despite his successes, however, Aglietti was not confirmed for another season, and
Ivan Jurić was named as his replacement in charge of the club a few days later. On 1 March 2020, he was signed by
Serie B club
Chievo. After guiding Chievo to the
2020–21 Serie B promotion playoffs, he left the
Gialloblu to accept an offer from Serie B club
Reggina, effective from 1 July 2021. On 13 December 2021, he was fired by Reggina following five consecutive losses. On 21 December 2022, Aglietti was appointed new head coach of Serie B club
Brescia. He was however sacked on 16 January 2023, after just two games in charge, with his predecessor
Pep Clotet being reinstated as head coach. On 12 February 2024, Aglietti signed for bottom-placed Serie B club
Lecco. He was sacked on 3 April 2024, after failing to change the team's fortunes. ==Managerial statistics==