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Products See Overview

Dry Type Transformers

Cast resin, VPI and specialty transformers

Pad Mount Transformers

Single-phase and 3-phase liquid-filled transformers

Power Transformers

Medium voltage power distribution up to 600 MVA and primary voltage up to 500 kV (1800 kV BIL)

Medium Voltage Switchgear

Gas-insulated and air-insulated switchgear solutions

Outdoor Substation Breaker

Configurable substation circuit breaker technology

Medium Voltage Packaged Unit Substations

Modular prefabricated power distribution system

Services See Overview

Field Service

After-sales service and support

Industries See Overview

Power Generation

Optimizing efficiency while improving the safety and sustainability of energy production.

Power Transmission

Innovating solutions that power a safe, reliable grid.

Power Distribution

Ensuring more efficient, reliable, and safer power distribution systems.

Solar Distribution

Supporting the development of solar platforms to shape a more sustainable future.

Wind Energy

Innovating wind technology to promote a cleaner, greener planet.

Commercial Buildings & Infrastructure

Meeting the ever-changing needs of global commercial infrastructure.

Data Centers

Designing solutions that power digital infrastructure.

Industrial Facilities

Engineering advanced power solutions that meet the needs of modern factories.

Rail & Transportation Systems

Supporting the electrification of modern transport systems and infrastructure.

About Us See Overview

Our Locations

With manufacturing plants and offices across 3 continents, we are here when and where you need us.

JST Visitor's Guide

Visiting JST in Lake Mary, Florida? View and download our Visitor's Guide here.

Leadership Bios

Our exceptional team of executives, each a standout in their respective credentials, bringing together diverse expertise, visionary leadership, and innovative thinking.

Sustainability

Minimizing our impact and helping customers do the same.

Sustainability See Overview

2025 Environmental, Social & Governance (ESG) Report

News, Literature, & Events See Overview

News

Stay connected with us and see why we are leaders in the industry.

Product Literature

Check out our literature library.

Events

Join us at these upcoming industry events.

Products See Overview

Dry Type Transformers

Cast resin, VPI and specialty transformers

Pad Mount Transformers

Single-phase and 3-phase liquid-filled transformers

Power Transformers

Medium voltage power distribution up to 600 MVA and primary voltage up to 500 kV (1800 kV BIL)

Medium Voltage Switchgear

Gas-insulated and air-insulated switchgear solutions

Outdoor Substation Breaker

Configurable substation circuit breaker technology

Medium Voltage Packaged Unit Substations

Modular prefabricated power distribution system

Services See Overview

Field Service

After-sales service and support

Industries See Overview

Power Generation

Optimizing efficiency while improving the safety and sustainability of energy production.

Power Transmission

Innovating solutions that power a safe, reliable grid.

Power Distribution

Ensuring more efficient, reliable, and safer power distribution systems.

Solar Distribution

Supporting the development of solar platforms to shape a more sustainable future.

Wind Energy

Innovating wind technology to promote a cleaner, greener planet.

Commercial Buildings & Infrastructure

Meeting the ever-changing needs of global commercial infrastructure.

Data Centers

Designing solutions that power digital infrastructure.

Industrial Facilities

Engineering advanced power solutions that meet the needs of modern factories.

Rail & Transportation Systems

Supporting the electrification of modern transport systems and infrastructure.

About Us See Overview

Our Locations

With manufacturing plants and offices across 3 continents, we are here when and where you need us.

JST Visitor's Guide

Visiting JST in Lake Mary, Florida? View and download our Visitor's Guide here.

Leadership Bios

Our exceptional team of executives, each a standout in their respective credentials, bringing together diverse expertise, visionary leadership, and innovative thinking.

Sustainability

Minimizing our impact and helping customers do the same.

Sustainability See Overview

2025 Environmental, Social & Governance (ESG) Report

News, Literature, & Events See Overview

News

Stay connected with us and see why we are leaders in the industry.

Product Literature

Check out our literature library.

Events

Join us at these upcoming industry events.

Organizational Announcement

Vice President of Transformers Operations

We are pleased to announce the promotion of Ignacio Castro to Vice President of Transformers Operations.

Ignacio has been an invaluable member of the JST team for more than seven years, serving as the Plant Manager of our Nogales, Mexico facility. Throughout his tenure, he has demonstrated exceptional leadership, operational excellence, and an unwavering commitment to continuous improvement, and customer satisfaction.  Ignacio brings an impressive combination of academic achievement and industry expertise to this role. He holds an MBA in Finance and has built a distinguished career spanning more than 28 years in manufacturing and operations leadership. Prior to joining JST, Ignacio served in leadership roles with Mertz Manufacturing, Milbank Power Manufacturing, and Woodcrafters, where he successfully led plant operations and drove organizational performance. He also served as Director of Quality for Otis Elevator, further strengthening his extensive background in operational excellence and quality systems.

During his time with JST, Ignacio has consistently delivered outstanding results while fostering a culture of accountability, teamwork, and continuous improvement. His leadership has been instrumental in the growth and success of our Nogales operations, and his strategic vision and dedication have earned the respect of colleagues, employees, and customers alike.  In his new role as Vice President of Transformers Operations, Ignacio will continue to play a critical role in driving operational performance, supporting our growth initiatives, and advancing JST’s commitment to excellence across all areas of transformer manufacturing and operations.

Congratulations, Ignacio, on this well-deserved promotion. We are grateful for your leadership, dedication, and countless contributions to JST. We look forward to seeing all the amazing things you will achieve in your new role and are excited about the impact you will continue to have on our organization.

Please congratulate Ignacio on this exciting next chapter in his career!

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Lake Mary, FL 32746

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