[1][2] Derivational suffixes in particular, together with most noun endings, consistently relate with specific genders, and there are very few frequent exceptions to this (as reflected in the first column).
[1][7] Most job titles have both a masculine and feminine form that reflects the gender of the professional, similar to the English distinction between "waiter" and "waitress".
Feminine job titles are usually created by adding -in to the grammatically masculine word in question.
For example, the general grammatically masculine term for train driver is Lokführer (singular or plural).
For job listings, if the generic masculine form is used, the Gesellschaft für deutsche Sprache recommends adding an explanatory note "(männlich/weiblich/divers)" or "(m/w/d)", indicating the role is open to persons of all genders.