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Twins Crew
Get to know the crew

A crew stands on more than two legs. Here you can find all information about the Twins Crew members.

Dr. Steffen Fiedler


After more than 15 years of experience in the application technology and development of extruded plastic films, our Steffen is very familiar with the types, properties, advantages and disadvantages of fossil and bio-based plastics.

In his private life, Steffen enjoys being out in nature in a kayak, on his bicycle or his bike and is a passionate barbecue master. With biogas, of course 😉

Alina Hoffmann, B. Eng.

Projekt manager

After Alina was able to gain her first experience with the extrusion of plastics during her bachelor’s degree in mechanical engineering with a focus on plastics technology, she is now stepping on the gas at Twins Crew. She is continuing her Master’s studies on the side.

In addition to her studies and work, Alina enjoys trying out new things, getting out in the fresh air and doing things with friends.

Dr. Mirko Rennert


Mirko already supplemented his pocket money at school by filling tankers and sacks with plastic granulate and went through the classic plastics school of study and everyday industrial life. This journey made him realize the need for careful use of fossil raw materials and how many above-ground, bio-based resources still remain unused.

In his private life, Mirko tries to see the world with good! coffee and soulful beats while trying to understand the world and maintain his fitness and down-to-earth attitude by coaching a basketball team and skateboarding.

Maybe YOU?

Cool job description

We are always on the lookout for people who want to do something, achieve something and, above all, make a difference. Making a career with your elbows on the ground instead of the edge of your hand?

Welcome to the Twins Crew. We are looking for you and we are sure that if you can identify with our vision, your photo will soon appear here.