Jerzy Zientkowski: Why you don’t need self confidence on stage. A lesson from the IT guy
Jerzy Zientkowski is a public speaker and coach. He is founder and owner of speakerslair.pl a coaching company, which organizes workshops, coaching sessions and helps clients with business presentations. He has nearly 20 years of experience in IT field, working for small and big companies. Jerzy currently has 100+ speaking appearances per year and has […]
