Our History


Lewis & Harrison formed in 1996 around a unique concept for consulting firms. Rather than retaining a full team of technical experts in-house as full-time employees, it developed an outside group of qualified consultants. In this way, the firm retained maximum flexibility to use the top experts in their fields to assist clients with their unique problems, while also reducing overhead and passing the savings onto its clients.

Lewis & Harrison maintains an active, on-call roster of several dozen skilled experts in various fields including:

• Toxicology
• Residue studies
• Efficacy trials
• Product chemistry
• Environmental and ecological effects

The founding principal partners, E. David Lewis and Eliot Harrison, each have more than 30 years of experience dealing with pesticides and the EPA, and every associate has on average more than a dozen years of experience dealing with pesticide registrations and related activities.

To date, Lewis & Harrison has assisted over 600 companies and manufacturers specializing in chemical, consumer, industrial, health-care and agricultural products. The companies span the gamut from large multi-billion dollar consumer and industrial companies to small start-ups entering the market for the first time, and are headquartered in more than two dozen countries around the globe.