Can I keep my freelancer profile and status if I'm an employee listed on a business page?

Yes, you can have a business page for your company and still use your individual freelancer profile.

ProZ.com business pages are separate from your individual profile. If you are the owner or employee of the business, when you quote on jobs you will have the ability to quote either as an individual or as an agent of a company which you represent. Being an employee or sub contractor to a business will not prohibit you from representing yourself as an individual.

On your individual profile you can choose to hide the company association: