"I'm a chemist looking for work in a good environment that's full of motivation and able to help me start my career creatively." But you'd be breathless by the end of that sentence. So, how about: "I'm a chemist wanting to get my career off to a creative start. So I'm looking for work in a good, motivating environment."

I would go with: As a chemist, I am looking to work in a warm, professional, motivating environment to start to my career on a positive note. Most of this is down to style but try to avoid talking about yourself in the third person (a chemist) because you then changed to first person (to help me start my career) and that's confusing for the reader. Hope this helps :)