Dear …
Congratulations on your new job at __(Name of Company)__. Having __(known/done business with/worked with/etc.)__ you now for __(length of time)__, I have no doubt that you will do exceedingly well in your new position. Any company would be fortunate to have forward-thinking individual like you on board because you are definitely very good at what you do.
As you know, our company is very customer service oriented and in your new role over at __(Name of Company)__, I’d welcome an opportunity to talk you about __(your new/their)__ goals in the __(type of)__ area. It’s quite likely that we may be able to be effective in helping __(you/them)__ to achieve them. I will be in touch with you soon to further discuss this.
Again, I congratulate you on your move to __(Name of Company)__ and send my best wishes to you for great success in your new role.
Sincerely,