40+ years building the transformers that demanding systems depend on.
Toroid Corporation has been designing and manufacturing superior toroidal transformers and power solutions from Salisbury, Maryland since 1983, serving engineers, OEMs, and Fortune 100 leaders across the Americas.
“We build transformers that move our customers’ projects forward. That has been the standard since 1983, and it is the standard for the next 40 years.”
Founded on a quieter, more efficient idea.
When most of the industry was still building conventional E-I laminated transformers, our founders made a focused bet: toroidal designs would deliver higher efficiency, lower magnetic fringing, and quieter operation for the applications that mattered most. 40+ years later, that bet has held up. Toroid Corporation supplies custom and standard magnetics to medical device manufacturers, industrial automation leaders, aerospace primes, broadcast engineers, and Fortune 100 OEMs across the industries we serve. We've grown from a single engineering and production facility in Salisbury, Maryland to a two-country manufacturing footprint, adding production capability in São José dos Pinhais, Paraná, Brazil to support our customers across the Americas. What hasn't changed is the standard: every transformer is designed, tested, and inspected to earn the trust of the engineer who specified it.
40+ years of building what comes next.
- 1982
Founded in Maryland by Gunnar Ennerfelt with a focus on toroidal design.
- 1994
Toroid expanded its manufacturing presence in Brazil, creating additional capabilities to support customers and growing international demand.
- 1999
Achieved ISO 9001 certification and introduced the IsoBox line.
- 2006
Katarina Ennerfelt became CEO as founder Gunnar Ennerfelt stepped away from day-to-day operations, continuing the company's growth under second-generation leadership.
- 2013
Toroid Corporation celebrated its 30th anniversary of manufacturing transformers in the United States.
- 2020
During the COVID-19 pandemic, Toroid supplied critical transformer components used in medical systems and equipment.
- 2026
Benjamin Etherton became CEO, beginning a new chapter focused on strategic growth, operational excellence, expanded global manufacturing capabilities, and strengthening Toroid's position as a long-term partner for custom transformer solutions.
Principles engineered into every unit we ship.
- 01
Engineering first.
Our conversations start with engineers, not with sales people. Better problems produce better answers.
- 02
Built to last.
A transformer built today should still be in service in thirty years. Our field failure rate proves it.
- 03
Say what we'll do.
Clear specs. No surprises in the box. Our customers don't have time for guesswork.
- 04
Own the outcome.
Our team handles every step from first integration; we stand behind what we ship, and we stay engaged until it works.
The team behind Toroid.
- B · E
Benjamin Etherton
Chief Executive OfficerBen brings more than 15 years of leadership experience across manufacturing, energy, healthcare, and other industries. Throughout his career, he has led organizations and large-scale initiatives focused on growth, operational improvement, and long-term strategy. As Chief Executive Officer of Toroid Corporation, Ben is focused on strengthening the company's global operations, expanding its manufacturing capabilities, and positioning Toroid for continued growth while maintaining the quality, engineering expertise, and customer service the company has built its reputation on.
- J · W
Jennifer Wawrzeniak
PresidentJennifer joined Toroid Corporation in 2016 as a Project Coordinator and Assistant to the President. She later expanded her responsibilities into Purchasing and served as General Manager of the Arcon Training Center before becoming Toroid's Chief Administrative Officer in 2021 and President in 2023. Today, Jennifer oversees key administrative and business operations, helping ensure coordination across departments and supporting the company's continued growth and development.
- R · F
Romona Fontaine
Vice President of OperationsRomona joined Toroid Corporation in 1995 as a machine operator and has more than 30 years of hands-on manufacturing and operational experience with the company. She progressed through production leadership roles before becoming Quality Manager in 2000, a position she held for nine years, and later Vice President of Operations in 2019. Today, Romona oversees Toroid's manufacturing operations, drawing on decades of production and quality experience to support efficiency, consistency, and customer requirements.
- C · E
Christian Ennerfelt
EngineeringChristian joined Toroid Corporation in 1984 after moving to the United States from Sweden, where he had already gained industry experience while completing his education. With an engineering background and decades of technical experience, Christian has played a central role in Toroid's engineering, technical sales, and product development. He leads much of the company's new product development and certification efforts, helping bring new designs from concept through testing, approval, and production.
- M · P
Michael Porter
ExecutiveMichael joined Toroid Corporation in 2002 and has built a broad understanding of the business through hands-on experience across customer service, sales, operations, and multiple departments. He later served as President of Toroid's former sister company, P&H, further expanding his leadership and operational experience. Today, Michael works across the organization as a highly versatile executive, stepping in wherever needed to solve problems, support teams, and help keep priorities moving forward. His deep knowledge of the company and willingness to work across functions make him a valuable resource throughout Toroid.
- B · M
Bailey Moses
Chief of StaffBailey joined Toroid Corporation in 2023 as Sales Manager, where she focused on customer relationships, sales operations, and business development. She became Chief of Staff in September 2026, expanding her role to support executive leadership and cross-functional initiatives across Toroid's U.S. and Brazil operations. Bailey brings a background in helping companies grow, improve efficiency, strengthen internal processes, and turn strategic priorities into action. Her focus at Toroid includes operational improvement, accountability, and coordination across sales, production, engineering, and administration. Bailey holds an MBA from Johns Hopkins Carey Business School.
Two countries. One standard.
- Salisbury, MarylandHeadquarters · Engineering · Primary Manufacturing
USA · Headquarters
Our headquarters and flagship manufacturing facility. Engineering, winding, assembly, testing, and executive operations all under one roof, designed for tight collaboration between design and production.
- São José dos Pinhais, BrazilProduction · Americas Supply Support
Brazil · Production
Additional production capability strategically located in Brazil's industrial district. Supports South American customers, regional lead-time reduction, and continuity planning for the broader American market.
Build a career at Toroid.
Our Salisbury, Maryland factory carries more than 400 combined years of transformer experience, and many of our team have been here for over thirty years. We accept applications year round, whether or not a specific role is posted. Call 1-888-286-7643 and ask for Human Resources.
Want to work with us?
Partnering, purchasing, or pursuing a career: we'd like to hear from you.