He probably never visited Sleen and Haren, instead using the functions, which had been given by influential family members, as a source of income.
After his study, he returned to Helpen, now a district of Groningen and Sleen, this time to convert the inhabitants to Calvinism.
He succeeded the Dutch reformer Albertus Risaeus, who died in 1574, and broke Calvinism through in Emden.
Shortly after he became preacher, countess Anna von Oldenburg died, so he led her Calvinistic funeral services.
In March 1595, Alting played a large role in a rebellion of the Calvinistic inhabitants of Emden against the Lutheran count of East-Frisia, Edzard II.