Who We Are

PENTA - an engineering company that commits to excellence in the industries we choose to serve.

PENTA Engineering Corp., established in St. Louis, Missouri, USA in 1986, is an international multidisciplinary engineering firm servicing many industries including Cement and Lime, Mining and Minerals, Fuels and Energy, Agro-Industrial and Manufacturing companies.

Our services range from technical and economic feasibility studies through plant commissioning, including consulting, design, procurement, and project and construction management for both new or refurbished facilities.

PENTA differentiates itself from other engineering companies by offering high level project management which allows our clients to rely on PENTA to execute their projects with a focus on providing deliverables within realistic schedules and budgets. Our project and procurement management services are focused on independent sourcing of equipment, meeting stringent specifications at competitive pricing.

We, as a company and as individuals, are focused on our client's needs and success.

To provide our clients with operational excellence through proven systems and procedures and a highly qualified professional staff, offering excellence in business management and technical services through innovation and integrity. To offer our employees a great workplace through mentoring, continuing education, recognition and promoting from within whenever possible.

To cover all regions of the world providing uniform high-quality engineering, procurement, construction management, and project management services. To allow our customers, wherever they seek, to refurbish or build new plants as a specialized engineering company dealing with all the project details, allowing them to focus on the productivity of their existing facilities.


David A. Chaput



David Payne




Richard G. Eberle Jr.



Juan Carlos Buitrago


Frank Benavides, P.E

PEC Consulting Group
PENTA India Cement & Minerals

Subhash B. Mohan, P.E.

PENTA Engineering Co. LLC
PENTA Industrial Corporation

 Gerald Young

VICE PRESIDENT of Process Environmental Engineering

PENTA Engineering Co. LLC

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Ken Schweigert

PEC Consulting Group

Stuart Guinther-about-us-page

Stuart Guinther


PENTA Engineering Co. LLC

Jayanta Saha

PENTA India Cement and Minerals

gary gifford-new photo-small

Gary Gifford


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Narayana Jayaraman

for Process
PEC Consulting Group

PENTA believes that conducting business in a socially, economically and environmentally responsible manner is the single path to maintain sustainable development.

Our commitment to clients, shareholders, employees and other stakeholders is defined by a balance of economic, environmental and social responsibilities which reflect the ability of future generations to meet their needs.

Health and safety are tenets of our Company. We uphold these tenets by providing our employees with appropriate and continuous training, by designing our customers' facilities in a manner that reflects respect and concern for their employees, and by assuring our stakeholders that our Engineering seriously considers health and safety measures in addition to sustainability.

PENTA’s engineering staff is continuously updating its knowledge base to improve processes and to increase environmental stewardship through state-of-the-art engineering; our staff is dedicated to assist our clients in achieving higher levels of sustainability.

Our abilities and experience have earned us the trust of industry organizations such as the Portland Cement and National Lime Associations, to provide training and prepare technical documents related to environmental matters.

PENTA understands that being on the forefront of technology is a must to meet client's needs in an efficient and effective manner. We value our client's investment and place the utmost care to preserve and guard project data. Some of PENTA’s information systems features include:

    Off-Site Data Processing Center

  • Located in a state-of-the-art data center to protect project information
  • Overall network availability
  • Protection against power outages and natural disasters
  • Ability to respond quickly to emergency interruptions, while maintaining project schedules

  • Web File Transfer – FTP site

  • Real time access to project information
  • Reliable and secure client access
  • Secure, expandable file access for your division of “joint-force” task team
  • Your data is secure and accessible only to you

  • Global Networking

  • Dedicated PENTA infrastructure
  • Direct contact between offices
  • Real-time file sharing
  • Secure connection for employees off-site