Technical Processing and Engineering IncLocation: 892 Blakeslee Blvd. Drive W., LehightonNumber of employees: 22Job opportunities: Long-term growth potentialWhat separates them from others: TPEI credits its success to a commitment to keep customers’ equipment functional, both for long-term success and emergency problems.One surprising fact: “People have been able to work their way up through the company, and do things that they never thought they would achieve,” said CEO Harold Shafer.