A strong PhD can be a useful academic signal, but firms are not hiring the diploma by itself. They need evidence that you can transfer your skills into client-facing business problems.
Translate research into problem solving, leadership, communication, and impact. Add business exposure where you can through clubs, pro bono projects, internships, entrepreneurship, or commercial collaborations.
Your goal is not to become an MBA candidate. It is to make the value of your PhD legible in a consulting context.