If you have questions about the conjugation of биоинженер or Russian nouns in general, you can practice and get feedback from a professional tutor.
Берченел, ведущий биоинженер, но много о себе думает.
Burchenal, one of the world's leading bioengineers, his own greatest hero.
Вот тут биоинженер.
the bioengineer right there.