About us

Networking the world of test instruments

ValueTronics was founded by John Griffith in 1992 as a buyer
and seller of used electronic test equipment. Over time, the company expanded
to include distribution of new instrumentation, building relationships with
more than 300 manufacturers. Today, ValueTronics supplies both new and used
electronic test and measurement equipment to customers and partners worldwide.

Following John Griffith’s passing, ownership transferred to
Glenn Dulski, who continued to build on ValueTronics’ core mission of providing
dependable test equipment solutions supported by knowledgeable service and
efficient processes.

In February 2026, ownership transitioned to Barry Preece, a
disabled veteran with extensive leadership experience in the electronic test
and measurement industry. Under Barry’s ownership, ValueTronics remains
committed to the principles that have guided the company since its founding:
technical integrity, operational discipline, and professional support for
engineers, buyers, and test organizations worldwide.

Our Team

Barry Preece

CEO, Majority Partner

My career has been defined by two things: a deep respect for critical technology and an unwavering commitment to the people who rely on it. My journey started in the woods and rolling hills of Ohio. This remoteness led me to enlist in the Army Reserve while still in high school. I spent my early years learning the intricate mechanics of auto repair and medical equipment before earning my degree in Communication from Ohio University. Shortly after graduation, I deployed to the Middle East for Operation Iraqi Freedom. My service left a permanent mark on my life, I survived the war zone only to be injured by invisible toxins. Exposure to burn pit chemicals left me with a VA Disability Rating, but it also forged motivation and resilience that has guided every step of my career since. Returning to civilian life, I knew I wanted to bridge the gap between complex engineering and commercial strategy. I cut my teeth at GE Healthcare, supervising a team of 16 biomedical technicians across 30 hospitals and serving on safety committees. By 2009, I moved to Naperville and entered into sales with Johnson & Johnson. My path eventually led me to Valuetronics, where I spent three fantastic years learning the core of this business. From there, I took on escalating sales leadership roles; managing national distributors, achieving top-tier honors at Electro Rent, and ultimately driving strategic accounts at Keysight Technologies for over five years. Now, my journey has come full circle. I am thrilled to return to Valuetronics as CEO. Because I've walked the floor, sold the equipment, and used these instruments in the field, I understand exactly what this industry requires. I am excited to leverage that extensive T&M background to continue growing Valuetronics into the future. Thank you for being our customer, we truly appreciate everything.

Glenn Dulski

CFO, Minority Partner

Glenn came to ValueTronics with over 25 years of accounting/ management experience in both domestic and international service and distribution industries. He acquired his Bachelors of Business Administration degree from Loyola University and is a Certified Public Accountant. He has been with VTI for over 20 years, working with the original founders and then joining the team as a partner. He grounds his life in the Christian faith and gives all honor and gratitude to God for his success. When he is not working or volunteering at Church, he focuses his free time on his wife, four children and nine grandchildren.

Tony Castrovillari

Operations Manager

With over 20 years of experience in purchasing and business operations Tony ensures the needs of ValueTronics customers are met and will always exceed their expectations. Tony obtained a Bachelors of Business Administration degree from Loyola University, Chicago. In 2019 Tony joined ValueTronics team taking on various roles within the company finding his most valuable contribution to be in his current role as Operations Manager. He is committed to taking this department to the next level by ensuring continuous improvement. Outside of the office he volunteers at his children’s school board and his church. He enjoys coaching his son in both basketball and soccer, and supporting both of his children chauffeuring them to and from the ice rink as they are accomplished figure skaters. Tony and his family also enjoy travel and all sporting events.

Peter Kirsch

Manager of Lab Operations

Peter, a graduate of DeVry University has over 38 years of experience directly related to repair and calibration of Test and Measurement equipment. Having worked for Nortel Networks and Zenith Electronics, he was part of a group of engineers who helped implement North America’s Digital Television Broadcast standard. His association with this company dates back almost 30 years as a supplier of surplus test equipment before joining ValueTronics over 18 years ago. He is a Warbirds enthusiast and member of the EAA who annually attends EAA’s AirVenture held in Oshkosh, WI. In his spare time, he enjoys reading science fiction novels and restoring antique radios.

Rebecca Sanford

Marketing Manager

Rebecca Sanford is a Marketing Manager who blends analytical thinking with genuine curiosity. After earning her Business Management degree from Western Governors University, she built a career focused on digital strategy, product marketing, and customer engagement. At ValueTronics International, she leads initiatives that strengthen brand visibility and help customers connect with the right solutions.

Arlene Dulski

Director of Human Resources

Arlene joined the VTI team in Spring of 2022. As the company began moving forward after experiencing the limitations covid inflicted, her expertise and experience in both the intricacies of running an HR Department and her knowledge of human behavior made her addition to the VTI Team a valuable asset. Arlene acquired her undergraduate degree in Behavioral Science while working at the prestigious Hewitt & Associates HR Corporation. Shortly after, she completed the Master’s Degree program in Behavioral Science at Lewis Unniversity. From Hewitt, Arlene moved on to managing McCann Industries HR Dept, later to become Director of HR for several years at Rose Paving Industries. As Director of HR, she not only grew their departments but worked to refine all their process’s. Adding to her meticulous and detailed nature, her love of people and the mechanics of human behavior lead her to acquire an additional master’s degree in clinical psychology. She is not only an HR professional but also a licensed therapist and a certified trauma therapist. Her years of experience and training make her an exemplary fit for our growing needs as our company matures, develops and faces an exciting future. If asked her passion she would start by proclaiming her love of the Lord, and her gratitude for all he has given her-first and foremost her family. Together her and husband have raised 4 accomplished children, 2 lawyers, a doctor, and a teacher. She has a passion for dogs, favoring bull dogs and boxers, and her favorite pastime is spending time with her children and their families. For everything she has accomplished in both the past and her future she gives thanks to a generous God.

Rick Hapanowicz, Ph.D.

Director of Quantum Test & Measurement

Rick is the Director of Sales for Quantum Test & Measurement for ValueTronics. Rick supports educational and government customers for ValueTronics. Rick has 30 years of experience in sales and marketing of scientific instrumentation. His first position was a product manager at Nicolet Instruments where he helped design their research series FTIR spectrometer which was used in the spectral measurement of the first Quantum Cascade Laser. Rick has experience with low temperature and high magnetic field instruments, including Superconducting Magnets, Optical and Helium-3 Cryostats and Dilution Refrigerators. Rick has helped many customers in North America with their instrumentation requirements for electrical, magnetic, thermal and optical measurements. He is a member of the Society for Applied Spectroscopy, IEEE, Optical Society of America and the American Chemical Society (38-year member). Rick has a B.S. & Ph.D. in Ceramic Engineering from Alfred University. Rick manages a nationwide portfolio of named accounts focusing exclusively on educational institutions with .EDU domains and government research laboratories with

Alfred Gonzalez

Principal Field Architect

I help our customers solve real-world challenges with adaptive test and measurement solutions. When I'm not doing that, you’ll usually find me in the kitchen experimenting with new recipes or out on a run trying to convince myself I’m still fast. I’m adaptable, hands-on, and bring practical experience to every project I touch. I love figuring out how things really work in the field and making sure they deliver results. As a proud family man, I’m genuinely excited to be part of ValueTronics during this exciting period of growth. The energy and momentum here are inspiring, and I’m looking forward to contributing to something meaningful while helping build what’s next alongside this team. I manage a 10-state territory spanning the Upper Midwest and Northeast, including Iowa, Massachusetts, Maryland, Minnesota, North Dakota, Nebraska, New York, Pennsylvania, South Dakota, and Wyoming.

Daniel Sanchez

Inside Test Architect

Daniel Sanchez is an Inside Test Architect at ValueTronics who works closely with engineers and lab teams to source reliable test and measurement equipment. Using a consultative, application driven approach, he helps customers evaluate specifications and viable alternatives to ensure each solution aligns with both technical requirements and budget goals. He holds a Bachelor of Science in Engineering (B.S.E.) in Computer Science from the University of Michigan College of Engineering. Daniel serves as an inside sales representative supporting 23 states across the South, Southwest, Mountain West, and portions of the Upper Midwest.

Javier Carrera

Principal Field Architect

Javier Carrera is a strategic, sales executive with an engineering foundation and a proven track record of driving global business growth across the aerospace and defense, telecommunications, and semiconductor industries. He began his career in hands-on technical environments, working with electronic testing and calibration systems where precision, reliability, and disciplined problem solving were essential. This early experience established a strong technical foundation and shaped his practical, detail-oriented approach. As his career evolved, Javier moved into senior, consultative, and customer-facing leadership roles, guiding organizations through complex technical evaluations and high-impact decisions. He is recognized for his ability to translate advanced engineering requirements into clear, executable business strategies that align technical performance with commercial and operational objectives. Javier holds degrees in Electronic Engineering Technology and Technical Management, enabling him to effectively bridge engineering teams and executive stakeholders. He brings a results-driven mindset to his work and is committed to building long-term partnerships that deliver measurable, sustainable value.

Kyle Rapp

Principal Inside Architect

Kyle Rapp is a Sales Engineer at ValueTronics, supporting customers with technical test and measurement solutions across a wide range of industries. Working in an inside sales role and closely aligned with regional outside sales counterparts, Kyle focuses on understanding customer applications first; then recommending the right combination of new or professionally refurbished equipment to meet technical, budgetary, and compliance requirements. With hands-on experience supporting instruments such as oscilloscopes, BERTs, power supplies, pressure and temperature calibration tools, and general lab equipment, Kyle brings a practical, consultative approach to each engagement. He regularly assists customers with application alignment, configuration guidance, calibration requirements, and total cost of ownership considerations, helping them make confident purchasing decisions. Kyle is known for clear communication, responsiveness, and a problem solving mindset. Whether supporting a one time purchase or a longer term test strategy, he works to ensure customers receive solutions that are technically sound, cost effective, and fully supported; leveraging ValueTronics’ unique strength in offering both new and certified refurbished equipment backed by testing, calibration, and warranty. Kyle serves primarily as an inside sales representative supporting 11 states across the Northeast, Midwest, and West Coast, including California, Connecticut, Iowa, Illinois, Indiana, Kansas, Maryland, Michigan, Nebraska, New York, and Pennsylvania, while also functioning as the outside representative for Connecticut

Scott Tanioka

Principal Field Architect

I am located in sunny southern CA and come from a manufacturing test engineering background. I started my career at Orthodyne Electronics in the semiconductor sector, designing and building test fixtures for ultrasonic wedge bonders they manufactured. From there I went on to work at various T&M distributors/OEM’s and have been in the industry for close to 15 years. I manage the entire Western region encompassing nine states; Arizona, California, Hawaii, Idaho, Montana, Nevada, Oregon, Utah, and Washington. Four Pacific Northwest states; Idaho, Oregon, Utah, and Washington.

Shawn Williams

Purchasing Agent

Shawn Williams brings a strong background in business operations, vendor coordination, procurement, and customer support within the electronic test and measurement industry. He holds an MBA from Judson University and supports ValueTronics customers and manufacturing partners through accurate quoting, order execution, and day to day coordination across complex sales and sourcing activities. In his role, Shawn works closely with internal sales teams, OEM partners, and customers to ensure technical requirements are met, pricing is accurate, and expectations are clearly communicated from quote through fulfillment.

Mark Smith

Principal Test Architect

Mark Smith is a sales professional at Valuetronics International with deep experience in electronic test and measurement equipment. He manages complex customer requirements by combining strong technical knowledge with a consultative sales approach. Mark is experienced in supporting engineers and purchasing teams with right sized solutions, inventory programs, and long term account development. Mark manages a multi-state territory covering the Northeast, Mid-Atlantic, and portions of the Midwest, including Alaska, Delaware, DC, Illinois, Indiana, Kentucky, Maine, Michigan, New Hampshire, New Jersey, Ohio, Rhode Island, Vermont, Virginia, West Virginia, and Wisconsin, with inside sales support provided by Mark for most states in his territory.

Why Choose Us?

ValueTronics is known as the leading distributor of electronic test & measurement equipment for our dedication to offering a wide range of top-quality products, outstanding customer service, and competitive prices. Over the past three decades we have developed a team of Sales Engineers and Lab Technicians that have over 100 years of combined expertise to best serve our customers. Professionals trust ValueTronics for their commitment to excellence and reliability in electronic test & measurement equipment.