How it all began

GEMMACON was founded in 2007 by Achim Knosp in the automotive after sales sector.

We have grown from a start-up into an established engineering service provider and have retained our dynamism and energy in the process. We combine these characteristics with our expertise and experience and can offer our customers tailor-made solutions. This is how we have been successfully supporting our customers for almost 20 years.

Whether as a temporary employee or a contract for work and services, we always focus on the success of the project.

In 2017, we opened another location in the USA – GEMMACON North America Inc. based in Long Beach, California. In 2018, GEMMACON Korea Ltd. in Seoul was added as a subsidiary in South Korea. Both locations specialize in software development and testing in the automotive environment. Within just a few years, GEMMACON has developed from a one-man company into a successful engineering service provider with three locations worldwide.

our subsidiaries

GEMMACON North America Inc.

Long Beach, California


Seoul, South Korea


Our company name GEMMACON is derived from the Latin word gemma (bud, gemstone) and consulting. From bud to fruit – from rough diamond to gemstone!



Stefanie Knosp
CEO & Shareholder

Fighter with a heart
Stormy seas show who is able to steer their ship safely into port.

As Managing Director and owner, I have successfully guided GEMMACON and its foreign subsidiaries in the USA and Korea through every crisis in recent years.
With my enthusiasm for innovation and new approaches, I continue to develop my company in a strategic and visionary way.
My focus is on helping our employees and customers to realize their full potential and grow sustainably.
At GEMMACON, we value personal interaction and set new standards for employees and customers.
Together we shape the future, develop new solutions and write success stories.

Bernd Kämmerer
Management Board, MB

Strategist and planner

With my many years of experience in monitoring complex projects and optimizing operational efficiency, I ensure that our services run smoothly. My leadership and strategic thinking drive our commitment to exceptional results.

I will support you with my expertise, because mutual success is my top priority.

our values


We stand by our word. We keep our promises and go the extra mile for our customers!


We are characterized by open and clear communication at every level. And we listen to you!


Our corporate culture is characterized by appreciation, honesty and transparency.


Our processes are lean and agile, allowing us to react as quickly as possible to new situations, challenges and customer requirements.


The transparency practiced at GEMMACON promotes trust, cooperation and open communication.


We have gained expertise and knowledge in our specialist areas from years of work, which means the highest quality of service for our customers.


Gutenbergstrasse 11
70771 Leinfelden-Echterdingen


+49 (0) 711 – 252 463 0