It was with great pleasure that I learned just now of your nomination as (name of the position). Allow me to congratulate you most warmly both on my behalf and on behalf of the company.
Certainly your willingness to volunteer your time and effort, as well as express your opinions, has contributed to your being selected for the post. We wish you all the best as you represent us.
I extend heartiest congratulations to you and your appointment as the (new role) and look forward to further bilateral cooperation in (field of activity) between (names of companies or institutions).
We have the pleasure to congratulate you on your assignment and wishing you a successful mission. Your company has made an excellent choice based on expertise, experience and talent.
We were delighted to hear of your victory in election. We are sure that under your great leadership, wisdom and guidance (city, company, institution) will strive to much greater heights and achievements. Let me once again reiterate my sincere congratulations on your success!
I would like to offer you my most sincere congratulations upon your assumption of your new responsibilities. We at the our company pledge our further support and look forward to productive cooperation.
Thank you for sharing the good news and I hope it's not too late to congratulate you for the well earned promotion to the post of the (new position). I wish you the best in this new term of office.
It gives me great pleasure to extend my warmest congratulations to you on your appointment as (new position). I trust that you will continue to work for the improvement of our business relationship.
Congratulations on your appointment and wish you every success in your new duties. Please be aware that you have our full support.
I wish to congratulate you on your new appointment and I take this opportunity to look forward in working closely and strengthen the cooperation between our companies.
It's my pleasure to congratulate you on your assignment and wishing you nothing but success. The company has made an excellent choice based on expertise, experience and talent.