Who We Are

PENTA. Practical Thinking. Smart Engineering.

PENTA Engineering Corporation was established in St. Louis, Missouri, USA in 1986. We are an international, multidisciplinary engineering firm servicing the industrial minerals and mining industries.

Our services range from technical and economic feasibility studies to plant commissioning to turnkey EPC and EPCM solutions.

PENTA offers:

  • Consulting
  • Engineering Design
  • Procurement
  • Project Management
  • Construction or Construction Management

PENTA offers comprehensive project management services and has successfully completed hundreds of plant upgrades, modifications, and complete greenfield new-builds over the last 30 years. Our clients can rely on PENTA to execute projects with a focus on achieving deliverables within realistic schedules and budgets. Our procurement management services are focused on independent sourcing of equipment, meeting stringent specifications while negotiating the most competitive pricing.

PEC Consulting Group LLC, PENTA Engineering Co., PENTA Industrial Corp. and PENTA India Cement & Minerals Pvt. Ltd. are solely owned by PENTA Engineering Corp.

Our Mission & Vision

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 consulting, engineering, procurement, construction management, and project management services. To offer our customers, the services of a specialized engineering company dealing with all the project details, allowing them to focus on the productivity of their existing facilities.

Our Team

Frank Benavides, P.E
Subhash B. Mohan, P.E.
Stuart Guinther-about-us-page Stuart Guinther


PENTA Engineering Co. LLC

gary gifford-new photo-small
Gary Gifford
Sharmila Bhagawat
PENTA India Cement and Minerals
img 1063l Narayana Jayaraman
Technical Director

Corporate Responsibility

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 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.