He was previously in charge of the club between 2017 and 2019.
Earlier in the week Courtwood announced that Laois U-20 football manager Eddie Kinsella would return as their senior football manager for 2021.
He previously took charge of the east Laois side between 2017 and 2019, leading them to the Intermediate title in 2018.
Courtwood retained their senior status in 2020 by defeating Arles-Kilcruise in the relegation playoff.
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