Mary Ann E. Ventura

Siegfred B. Zarriz is a corporate trainer with over 13 years of experience in customer service, contact center operations, and learning & development. Having spent most of his career with Transcom, he has trained and coached new hires, supervised nesting programs, developed training materials, and led upskilling initiatives for global telecommunications and customer service accounts. His expertise in coaching, performance improvement, and operations support enables him to deliver practical, workplace-focused training that enhances employee performance and customer experience.

Jan Nigel Teves is a Learning and Development professional with extensive experience in instructional design, training facilitation, and organizational capability development. He has led learning initiatives across the retail, healthcare, government, and education sectors, designing and delivering impactful training programs using the ADDIE framework. As a Certified Learning & Development Professional (CLDP), Nigel specializes in creating engaging, learner-centered experiences that strengthen leadership, customer service, onboarding, and workplace performance. He is passionate about helping individuals and organizations build practical skills that drive continuous growth and operational excellence.

Maria Karen G. Keeler is a seasoned corporate trainer and former BPO Managing Director with over 25 years of experience in training, operations management, business process improvement, and contact center leadership. She has trained thousands of professionals across various industries, specializing in Microsoft Office productivity tools, data analytics, data storytelling, leadership, and operational excellence. Karen is known for delivering highly practical, engaging, and business-focused learning experiences that help professionals improve productivity, make data-driven decisions, and optimize workplace performance.