Edward Seitz was burning the candle at both ends, and in the middle.

Mornings and afternoons he drove a school bus, and during the day he drove a beer delivery truck.After he finished the workday for his two employers, he hopped in his pickup and became self-employed.One customer at a time, he called on the people who had hired his fledgling pest-control business. Gradually, as the pest control business grew, it became clear that something had to give."He decided to make the plunge," said his son, Brian Seitz, of Seitz Brothers, now celebrating its 40th year in business."The business has been family-owned and operated since 1975."Brian Seitz joined the business in 1996, after he graduated from Marian High School in Tamaqua. Today the business has 90 employees at three locations, Tamaqua, Tannersville and Trexlertown.From those locations, Seitz services northeast and central Pennsylvania, the Lehigh Valley and Philadelphia suburbs, and the Pocono Mountains and western New Jersey.Although termite and pest control remains the largest part of the business, Seitz also handles radon remediation, mold and asbestos removal, and waterproofing."We saw a need for it," Brian Seitz said, explaining the expansions into other services."We're constantly evaluating the newest and latest technologies, and needs for our customers both residential and commercial."Seitz keeps pace with the constantly evolving industry by mixing classroom and on-the-job training for its technicians, who are all state-licensed. Technicians are trained to do a thorough inspection, and design a service plan that fits the customer, especially those with children and pets.In the past several years, one pest has become more and more prevalent, Seitz said."Bed bugs," he said. "We weren't even talking about them years ago; now, they are everywhere, not just in beds and hotels as people think they can be in movie theaters, schools, anywhere."Seitz said that bed bugs have added "a whole new element" to the pest control industry.The treatment involves an initial application of a chemical, followed by heating the area to 130 degrees."They're hard to kill," he said. "The process can take from 8 to 12 hours."He added that the secrets to the company's longevity are service and employees."You can't have one without the other," he said."We have a really good group of employees, and without them we wouldn't be able to provide the services that we do."