Company Directory

David Wands
David Wands


Education: Tulsa County Vocational Technical, Master CAM, GD&T Training, Esprit CAM
Mike Mann

Vice President of Engineering

Education: MS - Mining Engineering, BS - Mechanical Engineering
Tamara Mann

Vice President of Finance

Education: BBA- Accounting & Economics, Member - TriState HR Association
Doug Metcalf

Production Manager

Dr. Eric Roll

Chief Engineer

Education: PhD - Engineering Science and Mechanics, MS - Engineering Mechanics, BS - Mechanical Engineering
Jeff Freeman

Sales Manager

Gretchen Freeman

Customer Care

Steven Mann


Education: BS - Aeronautical Engineering

Lee Foster

Quality Manager

Accredited and Trusted

At GPP we take pride in maintaining the highest standard of quality for our customers.

ISO Certification

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Export Policy

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Quality Policy

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