The primary teacher or leader in a specific area of training.

मुख्य प्रशिक्षक

English Usage: The chief instructor led the workshop on advanced photography techniques.

Hindi Usage: मुख्य प्रशिक्षक ने उन्नत फोटोग्राफी तकनीकों पर कार्यशाला का नेतृत्व किया।