Adriaan "Aad" de Mos (born 27 March 1947) is a Dutch retired professional football manager whose career spanned for almost thirty years.

In 1993, after his successful stints with Mechelen and Anderlecht, de Mos came back to the Netherlands and became the new manager of PSV Eindhoven, faced with the task of cleaning up an aging team.

In September 1994, he positioned the centre forward Erik Meijer, known for being able to make good headers, for incomprehensible reasons as a back against Bayer 04 Leverkusen.

In that period, he managed Werder Bremen, Standard Liège, Sporting Gijón, Urawa Red Diamonds, Mechelen once again, Al Hilal and the United Arab Emirates national team.

De Mos signed a six-month contract with Greek club Kavala, with an option to extend it up to January 2010, following the sacking of Vangelis Goutis.

On 2 April 2010, only one day after his resignation from Kavala, de Mos was named new manager of Sparta Rotterdam, replacing dismissed boss Frans Adelaar.

His adventure at Sparta started with little success: a 1–1 home draw to Heracles Almelo was followed by two consecutive losses, with his side being overtaken by ADO Den Haag, forcing the Rotterdam team to take part to the post-season promotion and relegation tournament in order to maintain its place in the Eredivisie.

In the first leg of the relegation play-offs second round, Sparta were stunned by Eerste Divisie outsiders Helmond Sport, losing the game 2–1.