Career
The Bickers provided silver and ships to Spain, and were very much interested in ending the Eighty Years War. This brought them in conflict with the stadtholder, some provinces, like Zeeland and Utrecht, and the Reformed preachers. He came to the fore through his knowledge and moderation.
In 1627, he was delegated to go to Sweden and Poland, to close negotiations between these two countries, mediate a peace (culminating in the Treaty of Sztumska Wieś) and at the same time set up new Baltic trade agreements.
In 1631 he was the owner of a few plots in Spanderswoud in "s-Graveland, the site where now the fine Trompenburgh house stands. The Bicker family also had concerns in peat-digging in Drenthe.
At the solemn entry of Maria de Medici into Amsterdam in 1638, he and Albert Burgh welcomed her in the name of the city"s government. In 1643, he went with Jacob de Witt to Sweden to mediate between Sweden and Denmark.
Andries Bicker opposed the stadtholder Frederick Henry, Prince of Orange, who intended the centralize the five admiralties, which would cause the Admiralty of Amsterdam to lose influence.
After the Peace of Münster was signed, Bicker was of the opinion that it was no longer necessary to maintain a standing army, bringing him into vehement conflict with prince Willem II, who had succeeded his father Frederick Henry as stadtholder. To regain power William went on the march towards Dordrecht and Amsterdam with an army. His troops got lost in a dense fog and were discovered by the postal courier on Hamburg, who also warned Andries" son Gerard, the high bailiff of Muiden, to leave without delay for Amsterdam.
The mayors of Amsterdam had the civic guard called out, the bridges raised, the gates closed and the artillery dragged into position.
Henceforth, it was the equally republican-minded brothers Cornelis and Andries de Graeff, and their following, who dominated Amsterdam.