Two professional Bangkok knife sharpeners are:
SHARPLINE KNIVES
https://web.facebook.com/sharplineknife/?_rdc=1&_rdr
and
CUTBOY KNIFE
https://www.cutboyknife.com/
Both have sites on face book.
I apologize for the other member with snarky comments belittling you not being an expert knife sharpener. He clearly knows little about quality cutlery.