Portrait of the Mounting Systems Company

Mounting Systems GmbH, an ISO-certified company, is one of the largest manufacturers of racking systems for photovoltaic and solar-thermal power plants worldwide.

Founded in 1993, Mounting Systems GmbH moved to Rangsdorf near Berlin in 2004. In 2010 the company opened a sales office in Lyon France.

In early 2011, Mounting Systems, Inc. a full-capability subsidiary of Mounting Systems GmbH began operations in West Sacramento, CA. Mounting Systems, Inc. also maintains contract manufacturing facilities in Toronto, Canada.

In March, 2012 the company opened another location in Milton Keyes, UK and in 2013 a representation office in Tokyo, Japan.


Stefan Spork heads Mounting Systems GmbH as Managing Director. Kasim Ersoy serves as CEO of US and Canadian operations.


We offer innovative, highly cost-effective solutions for roof-top and open terrain PV and solar thermal applications and have product installed in over 40 countries around the world.

With manufacturing facilities in Germany and the United States we can efficiently ship our products virtually anywhere worldwide.

Company philosophy

As a dynamic, international company, we offer quality, service and delivery reliability. Our goal is to develop, produce and deliver innovative products, system solutions and services for our customers.


We maintain close relationships with our customers and the industry to match the latest in market requirements with the state of the art in technology. Our Engineering team strives to continuously improve our products and produce the highest quality mounting systems on the market.


We strive to be the best possible supplier to our customers and to be good partners to both our clients and our vendors.


The Management

Stefan Spork, born in 1966, has been Managing Director of Mounting Systems GmbH since January 2008 and in 2010, became Chairman of the Board at the company subsidiary Mounting Systems, Inc. in West Sacramento, USA.

From 2007 to 2008, he was responsible for purchasing and product management in the solar thermal and heat pump sectors at Conergy AG. From 2003 to 2007, the graduate engineer worked at Vaillant GmbH as a Commodity Manager for Renewable Energies. Stefan Spork began his professional career at Fröling GmbH & Co. KG as deputy head of development for boiler engineering and head of the testing department. Later, he moved to the purchasing department and took over the leadership of strategic purchasing.

Stefan Spork has a degree in engineering and also successfully obtained an MBA at the University of Maastricht in the Netherlands. The Rhineland-born Managing Director is married and has a daughter.


Kasim Ersoy has been the CEO of Mounting Systems, Inc. since its 2010 establishment in West Sacramento, California.

After earning his degree in Business Administration, specializing in Accounting, Controlling and Taxation, Kasim Ersoy started his career with Conergy AG in August, 2004. In July of 2008 he took the position of Director of Business Administration and Finance for Mounting Systems Gmbh in Rangsdorf, Germany. 

Spending much of 2010 in the research and development of the U.S. sales and production office, he moved to California to assume the role of Chief Executive Officer of Mounting Systems, Inc. in January, 2011.

Locations and Responsibilities

Locations and Responsibilities

For over 21 years, the ISO-certified Mounting Systems GmbH has been one of the largest and most experienced manufacturers of solar mounting systems in the world. With manufacturing facilities in Rangsdorf, Germany, West Sacramento, California and Toronto, Ontario, Mounting Systems’ product portfolio includes a complete range of racking systems and components as well as module and collector frames.