In workplaces, efficiency or processes (ex. Lean Manufacturing or Kaizen) creates a greater output and/or saving money. While words like efficiency or economical implicitly suggest saved time, I'm trying to find a term that would condense "saving time and thus money" without losing the "thus money" semantic.
You maximize your profits and returns.
Make as large or great as possible: ‘the company was aiming to maximize profits’
[Oxford Online Dictionary]
Maximization of profits could be achieved by "saving time and money", minimizing cost and waste, increasing productivity/efficiency, laying off workers, etc.
5 a : marked by clever discerning awareness and hardheaded acumen b : given to wily and artful ways or dealing
someone who protects or is responsible for money, property, etc.
a person whose job is to manage the land and property of another person
To be more clear, you could use just describe the person as shrewd and both time and money, among other things, is already implied. Or you could just say that someone is a steward of time and money.
If we don't use our working time to earn money, we are in effect losing money.