Palar then held the position of secretary of the Colonial Commission of the SDAP and the Netherlands' Trade Union Federation (Dutch: Nederlands Verbond van Vakverenigingen (NVV)) starting in October 1933.

This was not received well by the PvdA resulting in the party distancing itself from the original position of unconditionally recognizing the right of national independence for Indonesia, which was opposed by Palar.

Being assigned by his party on a fact finding mission to Indonesia, Palar again met with the leaders of the Indonesian National Revolution including President Sukarno.

This time period included such important events as the continued Dutch-Indonesian conflict, the transfer of sovereignty from the Dutch, and the inclusion of Indonesia as a member of the United Nations.

During the Dutch-Indonesian conflict, Palar argued the case of Indonesian independence at the UN and the Security Council, even though his status was only as an "observer" because Indonesia was not a member of the UN at the time.

After a second politionele actie was unpopular and subsequently condemned by the Security Council, the Roem–Van Roijen Agreement was signed, which led to the Dutch-Indonesian Round Table Conference and the recognition of Indonesian sovereignty by the Dutch on 27 December 1949.

In 1955, Palar was called back to Indonesia and was instrumental in planning the Asia-Africa Conference, which gathered Asian and African states, most of which were newly independent.

Palar retired from foreign service in 1968 having served his country during its early struggles and conflicts and battled for its freedom in the diplomatic arena.

[2] He was survived by his wife, Johanna Petronella "Yoke" Volmers, and children Maria Elisabeth Singh, Maesi Martowardojo, and Bintoar Palar.