This will depend on the type of employer and on whether you carry out reserved legal activities for the public. If your role is purely to advise and act for your employer and you do not (and don’t plan to) provide such services to the public, your position should remain unchanged and you would not need to advise your employer to become a licensed body.
If you work for a commercial organisation such as an insurance company providing legal services, which include reserved legal activities, to the public or a section of the public your employer will almost certainly need to become licensed as an ABS. The only exemption will be if you act only for clients who are specified as not forming a section of the public, for example members of a trade union.
If your employer needs to apply for a licence but does not wish its whole business to become licensed as an ABS, an option would be for it to set up a separate body which is licensed and which employs you to provide the legal services.