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One of the largest providers of Safety Instrumented Systems (SIS) engineering/consulting in the U.S.

Mangan, Inc. Acquires Horizon Consultants

Forming one of the largest Process Safety Engineering firms in the U.S.


Monday, July 1, 2019

Established in 1996, Horizon Consultants is strategically located in Gonzales, Louisiana. We've had several Long Term Client Relationships in excess 15 years  and successful competition in excess of 300 turnkey SIS Projects. Mangan Inc. has positioned itself as an industry leader in SIS engineered solutions in North America. The purchase of Horizon provides us with a local presence to serve Louisiana clients. 

“This acquisition made sense on so many fronts,” says Amin Solehjou, CEO of Mangan. “Horizon Consultants shares our ’customer-first‘ doctrine in business, provides complementary engineering solutions and aligns with Mangan, corporately and culturally. Combining our technical skills across the U.S. while equipping the outstanding engineering consultants at Horizon to apply our Safety Lifecycle Management (SLM) software platform positions Mangan as the premier SIS Engineering service provider. We look forward to continued growth in safety systems engineering/consulting by delivering top-tier service, and talent to our clients.” 

Harold Howard, President of Horizon Consultants, comments “We have found a strong business partner in Mangan, Inc., that shares not only our level of expertise and business philosophies but also provides a solid foundation for us to extend services to our long-term clients. A combination of the Mangan SLM software platform, their established footprint across the U.S., and strategic relationships will create an SIS Engineering/Consulting group capable of world-class customer support for years to come. “

Horizon provides SIS engineered solutions tailored to your project.


Our Capabilities

Risk Assessment/SIL Assessment

Operations/Plant Integration

Life Cycle Services

Process Technology Expertise

Maintenance Experience

Application experience with SIS platforms 

SIS Platforms
  • Tricon, Tricon CX, Trident and Tri-GP

  • HIMA

  • Safety Manager

  • Allen Bradley CLX-SIL2

  • ICS Triplex®

  • AADvance®

  • SIL 3 Modicon Quantum


  Contact Us: 

Richard Gaas

Marvin Walton

Harold Howard