Grammar
1) As you will have noted from the above list, the suffix "-in" is often added in the feminine form - i.e. Kellner + "-in" = Kellnerin.
2) Sometimes the female equivalent modifies slightly with the addition of an "Umlaut" - i.e. Arzt + "-in" = Ärztin.
3) Occasionally the male form ends in "-in", and the female equivalent in "-e" - i.e. Bankangestellter - "-r" = Bankangestellte.
4) There are sometimes different words for male and female jobs - i.e. Geschäftsmann (male) and Geschäftsfrau.