For three years (1826-1829) he was pastor of the Reformed Church at Ulrum, and then entered upon his lifelong duties as professor of theology at Groningen.
Petrus Camper | Petrus Plancius | Petrus | Petrus Ramus | Geert Hofstede | Frederik de Groot | Boudewijn de Groot | Petrus Christus | Lars Petrus | Groot River | Jacques Fred Petrus | Hofstede's cultural dimensions theory | Groot Marico | Petrus Van der Velden | Petrus Hofstede de Groot | Petrus de Natalibus | Petrus Codde | Petrus Canisius van Lierde | Petrus Astronomus | Petrus Alphonsi | Petrus Alfonsi's Tetragrammaton | Peter Hofstede | Joseph Petrus Hendrik Crowe | Jan Jakob Maria de Groot | Francis de Groot | Anne Searls De Groot | Adriaan de Groot |
With Louis Gerlach Pareau (1800-1866) and Petrus Hofstede de Groot (1802-1886), he formed the nucleus of an influential theological movement known as the Groningen School.