With a few exceptions the words of and the are not needed. The trick is to take an adjectival or possessive approach to nouns.
The manager of the bank
The bank manager.
The president of the company
The company president
Here are examples of another type of sentence in which the words of and the can be eliminated:
One of the protesters at the site
A protestor at the site
The indefinite article (a) already tells us more than one protester is at the site. If there were only one protester, we would use the definite article (the) and say “the protestor”.
One of the women in the shop
A woman in the shop
Again, the indefinite article tells us there was more than one woman in the shop.