Tony Espinoza
Founder
CallTek will always remember, Tony Espinoza, our beloved CEO and founder.
In 20 years, his passion and commitment turned CallTek into a global enterprise that touches consumers each day through the myriads of technology operators and service providers who depend upon the company for support.
Tony’s vast contributions to the company, employees and the technology industry will endure for years to come.
Tony Espinoza
CEOA natural problem-solver, Tony Espinoza has dedicated his professional life to creating technology solutions that help businesses turn obstacles into opportunities. As a young man his love for technology took him from Southern California to the Philippines where he created his own opportunity and founded CallTek in 2004.
Over the past 18 years, his passion and commitment has turned CallTek into a global enterprise that touches billions of consumers each day though the myriad of technology operators and service providers who depend on the company for support.
Tony’s background in engineering enables him to be able to identify and create solutions from the ground-up. He holds numerous patents for technology protocols that provide solutions for CallTek clients every day.
He is based in Cebu City, the Philippines but spends much of his time traveling the globe meeting with clients. Tony enjoys introducing clients to the rich culture of his adopted home and makes darn good tacos on the side.
Danny Wu
Interim CEO VP Global Operations
Danny Wu serves CallTek as the Interim CEO and Vice President of Global Operations based in the company’s headquarters of Irvine, CA. He has been an integral component of CallTek’s success and growth for more than 16 years.
His involvement with global IT and data center operations, vendor management, as well as IT compliance and security gives him a high level of expertise in overall operations. He most previously served as CallTek’s General Manager.
A graduate of the University of California School of Engineering, Danny served as an Engineering Manager at Guest-Tek before joining CallTek in 2009.
German Lopez
Chief Financial Officer
As CallTek’s CFO, German Lopez is a transformational leader with over two decades of executive experience; bringing strategic vision, operational excellence, and a global mindset to the company since 2023.
German also serves as CFO of Allied Global, CallTek’s parent company, where he has been a driving force behind the company’s transformation from a startup to a global enterprise with over 6,000 employees across Latin America, South America, and Southeast Asia.
German’s leadership impact reaches beyond corporate walls. As former President of the Contact Center & BPO Guatemalan Association, he was instrumental in shaping national industry standards and fostering a culture of excellence and competitiveness.
At CallTek, German brings bold leadership grounded in financial discipline, global perspective, and a deep passion for building resilient, future-ready enterprises.
Oscar Colon
Chief Technology Officer
Oscar García Colón is a technology visionary and hands-on software builder with over three decades of experience transforming industries through software engineering, cloud architecture, and AI-driven strategy. He was appointed Chief Technology Officer in January 2024, and as part of CallTek’s parent company, Allied Global, has been instrumental in developing support solutions that leverage the latest technological innovations.
In addition to his work at CallTek, he also serves as CTO for Allied Global and as Board Technical Director at ALY.ai, where he leads enterprise clients around the globe through complex digital transformations — from modernizing legacy systems to deploying scalable, AI-powered solutions that unlock performance and productivity.
Oscar has utilized his technical skills and visionary strategy to harness the power of AI and emerging technologies to drive smarter, faster, and more human ways of doing business.
Danny Wu
VP Global OperationsDanny Wu serves CallTek as Vice President of Global Operations based in the company headquarters of Irvine, CA. He has been an integral component of CallTek’s success and growth for more than 13 years.
His involvement with global IT operations, vendor management, data center operations as well as IT compliance and security at CallTek gives him a high level of expertise in overall operations. He most previously served as CallTek’s General Manager.
A graduate of University of California School of Engineering, Danny served as an Engineering Manager at Guest-Tek before joining CallTek in 2009.
DJ Widmer
VP of Business Development
Healthcare
DJ Widmer has his focus on the US healthcare industry as CallTek’s Vice President of Business Development for Healthcare. He manages a North American-based industry specific team and serves as a consultant for CallTek’s Remote Patient Monitoring clients.
His 20 years of experience leading start-ups and growth-stage companies across the technology and healthcare sectors provides insight to the unique needs of one of the most rapidly changing industries today. DJ has extensive experience bringing technology to long-term care, assisted living chains, the VA medical system and medical supply chains.
DJ earned an MBA from Concordia University and a bachelor’s degree in business from the University of Portland.
DJ Widmer
VP of Business Development
Healthcare
DJ Widmer has his focus on the US healthcare industry as CallTek’s Vice President of Business Development for Healthcare. He manages a North American-based industry specific team and serves as a consultant for CallTek’s Remote Patient Monitoring clients.
His 20 years of experience leading start-ups and growth-stage companies across the technology and healthcare sectors provides insight to the unique needs of one of the most rapidly changing industries today. DJ has extensive experience bringing technology to long-term care, assisted living chains, the VA medical system and medical supply chains.
DJ earned an MBA from Concordia University and a bachelor’s degree in business from the University of Portland.
