I am a member of a global organization that is particularly suited to the more "experienced" professional transitioning to the management consulting profession. I have made such a transition myself after 20+ in operations and process management.
If you check out the website for the Institute of Management Consultants at www.imcusa.org, you will find access to a few items which may be of interest as you make the transition. One such publication we have is titled "Management Consulting: Dream Job, Worse Nightmare" and it addresses some of the pros and cons associated with the profession.
Also, check to see if there's an IMC chapter in your immediate vicinity; they will also be able to assist you with your transition. HR and systems dynamics consulting is quite in vogue now especially regarding global Business Process Outsourcing for complete end-to-end processes. The IMC-USA is typically made up of professionals from the larger global consultancies as well as those like myself who are in private practice.
I sincerely hope this information helps you with your quest!