Dear Abhilash,
ISTD's Diploma is about a generation behind. Until two years ago, they had not revised their syllabus. I do not know their current position. However, it is a government-certifying body, and their fee is the lowest. Yes, it will add value to your CV.
Why consider a shift to training?
By the way, if you are a Regional HR Manager, especially of an MNC, why do you wish to get into training? Ultimately, what matters is the ability to bring about positive change through HR intervention, whether through employee training or other means.
Therefore, my humble request is for you to reevaluate your decision. Your next destination is supposed to be GM (HR). If you shift to training, will you in the future receive total emoluments equivalent to this position? Typically, not all training managers are paid on par with HR Managers. Additionally, being in HR offers more job opportunities compared to training. Training roles are generally fewer than those in HR. I would not have raised this point if you had spent your career in training. However, a mid-career change should not lead your career in the opposite direction. Hence, think carefully before acting.
In the meantime, I conduct training programs in the field of supply chain, business strategy, soft skills, etc. Would you be interested in collaborating with your company?
Thanks,
Dinesh Divekar