Back in Utrecht, in 1596 he became a member of the zadelaarsgilde (Saddler's guild), which then embraced the painters as well.
In 1611, along with Abraham Bloemaert, he was one of the founders of a new painters' guild, called "St. Lucas-gilde", and became its first deken.
[1] Moreelse was a well known portrait painter who received commissions from right across the Dutch Republic.
Moreelse was also active as an architect, building Utrecht's Catharijnepoort (1626, demolished c.1850) and possibly also the Vleeshuis (still extant) on Voorstraat from 1637.
He taught at Utrecht's tekenacademie, and among his many pupils was Dirck van Baburen.