Denny Mazurkiewicz is the founder and owner of Denny's Machines. He is an expert reapirman but he recognises he can't do everything and he won't live forever so he has taken on Kelli as a part time worker after he noticed her skills. He's agreed to take her on as an apprentice after she leaves school provided she doesn't slack off and gets the grades he knows she can (and also on condition that she doesn't do anything to land her in prison).
Denny is a third generation immigrant. His great grandfather emigrated from Poland to Uroguay. His grandfather emigrated from Uruguay to Canada and Denny immigrated from Canada, albeit just a few miles over the border in Vancouver where he was born. He seems to speak several languages but, despite his brilliance as an engineer, he doesn't seem to be all that educated in the conventional sense.
