Founded over 50 years ago, Castlet began its journey as Castlet (Electronic Engineers) Ltd., specialising in power supply solutions for ESP control in the industrial sector.

Castlet signed a manufacture under license agreement with Korea Cottrell Co Ltd in Seoul, South Korea. We also established Castlet South Africa (Pty) Ltd, in response to growing demand for new power stations in the country.

Castlet formed subsidiary company Castlet Australia (Pty) Ltd. Australia continues to be a strong market for industrial engineering solutions and we have partners based in Victoria, however the company was closed a decade ago.

Castlet signed a manufacture under license agreement with Korea Cottrell Co Ltd in Seoul, South Korea. We also established Castlet South Africa (Pty) Ltd, in response to growing demand for new power stations in the country.

Castlet won the Queen’s Award for Technological Achievement and became approved by the Civil Aviation Authority to sell into commercial aviation industry.

The company relocated to a purpose-built site on Bishops Road Industrial Estate in Lincoln, England, where we are still based today.

A viable part of the firm, bought four years prior by OMI International, was purchased from the administrators and renamed Castlet Ltd. Shares were sold to management and employees signalling a turning point in our history.

Castlet won the East Midlands International Business of the Year Award, followed by the Worldwide Exporter of the Year Award the year after. Castlet (India) Pty ltd was also formed, establishing our presence in the Indian subcontinent.

Castlet joins the Siemens Partner Programme, enabling new opportunities to enhance the firm’s visibility and reputation, and access to specific automation solutions.

Castlet launched its new microprocessor controller MCSIII, the latest technology for superior air and particulate control built on comprehensive design, prototyping, manufacturing and testing.

Castlet’s management team bought out Castlet Ltd, signalling the formation of Castlet Holdings Ltd. and a new era for the firm.

A new three-phase controller for high-voltage direct current electric power transmission systems, designed and commissioned by Castlet, goes into production, driving forward innovative solutions for air pollution management in heavy industry.

Castlet wins International Business of the Year at the Lincolnshire Business Awards, demonstrating our global reach and impact, operated from our headquarters in Lincoln.

Following the appointment of new Managing Director Tim Eagles in 2024, Castlet has entered a new era of growth. We became an employee-owned company, a move that empowers our people and strengthens our future and recently launched a new website to showcase our offering and secure our legacy.