Argon & Co is a global management consultancy that specialises in operations, strategy, and transformation.
Graduate program is 2 years following which there is the first promotion possibility. As far as I'm aware all gradautes thus far have been promoted to consultant following completion of the 2 year program. Generally I am happy with promotion opportunities and it seems many of my colleagues have been promoted promptly using a merit based system.
2 years of graduate program -> Consultant ->Senior Consultant -> Lead Consultant
The professional development process Argon is very well documented, with clear objectives and qualities that each role should be achieving and displaying. It is easy to understand what is expected of each role and how you progress to the next level. You also have a dedicated professional development manager, who is supposed to help you manage your progress and meet your career goals.