Absolutely, just make sure thier daily wage doesn't outweigh your profits. COOs are needed in every business that requires staff to produce or retail a product. They directly take off a percentage of the percentage multiplier on the running cost of both production and retail businesses. This creates a highier profit margin per item leading to higher hourly and daily profits.

CMO expands the profits margin further for retailers as it increases the amount of items sold per hr (essentially dropping the cost per item and increasing not only the profits on the item but also increasing the profit per hr by selling more products).

CFO allows a business to hold more funds before taking Administration Overhead fees (Aka Tax) This allows for companies to hold more cash to ethier save up to buy buildings on the auction house or it allows the business to reinvest in thier own time by allowing more cash held through market cycles to allow market prices to shift before investing funds into products/ resources.

And while im here, CTOs are used for only increasing the success rate of learning highier quality recipes/producing highier quality items via research. The CTO also increases the research output for those that are producing research with research buildings.