To create sub accounts for your colleague to manage your company profile, you may go to Account Setting : Account Users.
Only parent account user (admin) will be able to create other admin accounts or subsidiary accounts (client account) for your colleagues.
Job Market will not restrict the number of account that you are going to create or remove.
For each account create, you may need to provide a valid email address for your colleague and he/she will receive an activation email accordingly with the email you had provided.