Dear Felix
Thank you for your loyalty and hard work these past two months. I appreciate that it must have been difficult for you to supervise the day crew, as well as doing your own work. You have done an admirable job of holding things together.
I am sure you will be relieved to hear that our new day crew supervisor, Jane Doe, will be starting next Monday. She has several years of experience with both pneumatic systems and team leadership. I am confident that you will enjoy working with her. I know I can rely on you to help her get settled into the job.
Regards
Lydia