In 1701, he left for Batavia in the Dutch East Indies to serve as vice-president of the council of justice.
[2] Simons instructed and directed the dissava of Jaffnapatnam (Claes Isaaksz) to codify the Thesavalamai ("The Customs of the Land"), which was finished in 1707, and to this day applies to most Tamils in northern Sri Lanka.
Simons also initiated building the Leper Hospital in Hendala in the Gampaha District, which was finished in 1708 under his successor Becker.
[3] After his governorship he remained extraordinary member of the Raad van Indië, and, in 1708, he has the title Commissary of the Cape of Good Hope.
He left that year from Ceylon via the Cape to the Dutch Republic as admiral of a returning fleet of 18 ships, carrying a cargo with an estimated value of five million guilders.