Best credit card to use for work expenses but also has good rewards?

Pretty broad question,depends on what kind of 'rewards' you want to get.

Chase Sapphire Prefferred is a good go to bc the points transfer to almost anything.

If you have an airline or hotel you like, there is usually some kind of deal going on that gets you a bunch of bonus points/miles after you spend over a certain amount.

Do you want cash back, hotel points, air miles, reward points? Answer that and people can help you.