Employment Law Questions? Ask an Employment Lawyer.
Do you have a contract with the consulting company that says otherwise? What I mean is there any language in any contract that you would sign/have signed that would preclude you from taking another job inside the company?
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A business can choose to hire or not hire you and it is up to their discretion, it is unlikely that the consulting problem with have an issue but there really is not an legal authority either way that will keep the consulting company from stopping you from getting the full time job. It is always best to get things put in writing to protect your interests but if you have the opportunity to take a full time job inside the company instead of contract work, it is unlikely that the consulting company will have an issue. To answer your question, legally the company can hire and fire you as they please (within reason) so getting permission in writing would only help and preserve your job.
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