Yes, if you need to add an additional team member to your business account you can do this by getting your colleague to sign up for a personal Bluechain account and contacting the Bluechain support team to add them as a user of your business profile.
Please ask your team member to create a personal account via the Bluechain Web Portal. It's important that they register for an individual account by not selecting business or sole trader when they signup. Once they have completed account setup and verified their ID, please email [email protected] and share the email address they signed up with so that they can attach their user profile to your business one.