Established in 1994, Environmental Service Professionals, also known as ESP, is a publicly traded company that offers a range of inspection services. The company conducts a variety of energy and efficiency audits. Its wholly owned subsidiary, Environmental Safeguard Professionals, administers the Certified Environmental Home Inspector (CEHI) program. Environmental Service Professionals also operates a wholly owned subsidiary, Porter Valley Software, which is an inspection software company. Its other subsidiary, National Professional Services, is a management company that provides organization and association management, advisory council and board of director coordination, graphic design and printing, accounting and reporting and consulting services.
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