A little help for one sentence - Ausbildungsbestätigung

[Praia-do-Forte]

Hello dear colleagues, I´m sorry but my english is a bit out of order .
I was thinking and thinking about the translation of one sentence I have to prepare for my supervisor, but I can´t work it out properly .
I don´t want to show him a text that is totally ridiculous....

It´s supposed to be a confirmation of my residency status. I want to participate in an international congress, and to get a reduced fee I have to send a short letter written by my head of department telling that I´m enrolled as a resident (Assitenzarzt) in his laboratory, being trained in laboratory medicine.
My supervisor wanted me to prepare this text myself.

Could anybody help me?
Thaaaaanks a lot!!!

[AngieE]

Wie wärs damit:

To whom it may concern oder besser Nennung des Ansprechpartner/Organisationsbüros des Kongresses

We hereby confirm that Praia-do-Forte, Physician Assistant
is currently taking part at our residing training program at University ....Department of Laboratory medicine,.....
oder
is currently undertaking postgraduate studies at our University....Department of Laboratory medicine....

Sincerely,

[Praia-do-Forte]

Thank you!!!!

[SuperSonic]

Praia-do-Forte, Physician Assistant

Arzthelfer?!

I would say "is taking part in" and "undergoing postgraduate studies" (edit: "undertaking" seems to be quite common, too).