In 1969, he was appointed administrative assistant to the president.

In 1864 Tate was appointed assistant at the museum of that society.

He was appointed special assistant to the President on Budget in 2000.

In 1999, Morin was appointed parliamentary assistant, a position he held until 2001.

Five years later he was appointed chief assistant (Yfirkennari) to the rector.

In 1936 he was appointed assistant to the Puerto Rico attorney general.

In 1920 he was appointed assistant to the state overseer in Oklahoma.

In 1906 he was appointed botanical assistant at the Imperial Institute.

He worked in a chemistry laboratory from 1866 to 1871, being appointed assistant to professor Anderson in 1869.

In 1884 he was appointed assistant, later was associate, and finally full professor, in 1896.