About Us


Established by Mario Costanzo, Steve Goskie and Ray Vos in 1992, Simmtronic has grown to excel as a leader in the field of intelligent lighting control systems.

Simmtronic’s success is built on its people, underpinned by a desire to put the product and customer service first. By continually cultivating our talents, we continue to explore the depths of our collective expertise to deliver on the promise of Simmtronic products.

Simmtronic is an entirely UK based manufacturer, with a full time employed team of specialist software and hardware engineers. With vertically integrated capabilities from product design through to best-in-class after service, we believe that this ensures the greatest ability to adapt to the changing demands of our end user clients.

With the sector’s largest directly-employed commissioning team (currently 33) and a wealth of application experience, our experts positively influence and guide each project to ensure you have a solution that works, is easy to install, maintain and is cost effective.

Simmtronic headquarters are located conveniently just outside London in Hoddesdon, Hertfordshire. Manchester and northern areas are supported by a commissioning base in Stockport and a further sales office in central Manchester. Technical development is deployed across three geographical locations.

Our Team Members make us great at what we do.

Ray Vos

Director & Founder

Mario Costanzo

Director & Founder

Steve Goskie

Director & Founder

Jess Costanzo

Commercial Director

Helen Blake

Human Resources & Business Support

Sav Ferro

Project Office Manager

Joe De Marco

Purchasing Manager

Chris Holden

Aftersales Manager

John Gayle

Commissioning Manager

Barry Chaffin

Senior Technical Manager

Bill Sutcliffe

CAD Manager

Dan Parker

Application Engineer (northern regions)

Jeff Weston

Commissioning Supervisor (northern regions)


of team members have worked with us for more than 5 years


team members and counting


of all Simmtronic team members are commissioning engineers

Thank you Simmtronic, for your professional, fast and reactive support with the delivery of these projects.

Adam Scadding

EDDS Limited

Simmtronic have delivered a large number of technically challenging projects for DBS and consistently continued to provide outstanding service. Their support, guidance and help throughout the process has been exceptional, working closely with our design teams to ensure the right solution for the project and a sound understanding of the brief, with our delivery teams to ensure the installation and commissioning are trouble free and then providing fantastic after care to the customer. They have added true engineered value into the projects they have been involved in for Derry Building Services.

Geoff Caborn

Derry Building Services

Simmtronic have been a valued member of the DBS supply chain for over 10 years. Their pro-active and collaborative approach to lighting controls from the design stage, through to commissioning is highly valued by both our Design and Delivery Engineers.

Matt Hallam

Derry Building Services

Over the years I have really appreciated the Simmtronic ability to provide responsive support and listening to projects and clients needs. More recently the Simmtronic team has shown the capability to embrace the connectivity requirements of the Internet of Things by quickly adding MQTT to their range of integration protocols. This will greatly facilitate telemetry applications in buildings and the development of interconnected solutions that will make buildings more usable and easier to operate.

Francesco Anselmo


Landsec have consistently used Simmtronic Lighting Control Systems across our new London developments for over 15 years. Simmtronic understand our requirements and get involved at the very early stages of schemes, assisting consultants in achieving the optimum design solution, often taking the lead.  They always overcome the programme challenges they are faced with on site, delivering a quality, fully tested and operational solution, on time and to budget. Simmtronic undertake the maintenance and servicing across much of our London portfolio, they have a customer focused and flexible approach that suits the needs of our business and as well as our customers.

Mark Ponzini


Simmtronic as an organisation has been, for the last 18 years, by far the best performing and most reliable lighting control system I use. From design through to commissioning and soft landings with the landlord teams Simmtronic always deliver on my projects. Simmtronic technology evolution is not just pushed through like others, but rather properly tested internally first, giving us as client teams the assurance that what Simmtronic say they can offer is 100% delivered, an absolute must with fast track major projects.

Alan Williamson


Simmtronic has constantly been available at an early stage to engage both with the designers and the Contracting team to assist with design solutions and to test options. This ultimately assists us in de-risking the project during the commissioning phase which usually defines when the project is completed. Simmtronic is seen as ‘industry standard’ and it is always encouraging to see them involved.

Jo Benson

Derwent London