All About KEY Engineering, Inc.

Key Engineering, Inc. (KEY) is the largest locally based full service multi-discipline engineering and design firm in the Decatur, Alabama area. We provide professional services to the industrial, commercial, municipal and private sectors. KEY is an engineering firm composed of a progressive group of professional individuals committed to success. Our success is achieved because of our professional diversity and advanced capabilities. Our staff includes qualified engineers and designers from accredited educational institutions, with each discipline consisting of one or more registered professional engineers (PE). The primary objective is to maximize this resource by assigning the most appropriate personnel to each project, ensuring they are delivered error free, on time, and within budget.

KEY Engineering, Inc. | Facility | 287 Woodall Road | Decatur, Alabama

Established in 2003, KEY provides coordinated engineering, consulting, and design services spanning the gamut of disciplines. With our comprehensive mechanical, electrical, chemical, and structural expertise, we have worked on projects of all sizes and for a wide range of industries. As the engineering consultant of any project, no matter how small or large, KEY believes in the utmost attention to detail.

KEY is well positioned to serve our local industrial clients along the Tennessee River.  Also, we are strategically at the center of North Alabama to expand our services beyond the local area. Whether local or abroad, we give you and your project the attention you expect, providing innovative solutions and reliable results.

KEY Engineering, Inc. | Company Seal

Why Choose Us?

Engineering & Design

Services We Provide


Select to find out more about our Electrical Services...


  • MCC & Power Distribution
  • Lighting & Grounding
  • Instrumentation Specification & Installation Details
  • PLC & Controls
  • Design Cable Tray & Conduit Routing
  • Panel Layouts
  • Short Circuit & Arc Flash Studies
  • Area Hazards Classifications


Select to find out more about our Mechanical Services...


  • Process Equipment
  • Utility & Process Piping
  • Pipe Stress Analysis
  • Emergency Pressure Relief
  • Process Flow Modeling
  • Industrial Ventilation & HVAC
  • 3D Modeling
  • Air Dispersion Modeling


Select to find out more about our Structural Services...


  • Steel Design
  • Concrete Design
  • Peer Design
  • Building Framing Design
  • Platforms & Equipment Supports
  • Spread Foundation Design
  • Mat & Pile Foundation Design
  • Existing Structure Evaluation
  • Drawing Package Review

Who Are We

Our Vision

  • To want to be the best place to work in North Alabama.
  • Present a staff that believes in safety, teamwork, total quality, and commitment.
  • Develop sincere and honest relationships with our customers to earn their trust and business.

Our Management

KEY Engineering, Inc. | President | Trey Parks

Trey Parks

President – Mr. Parks has over 30 Years of experience in the mechanical engineering and design industry. He is also the mechanical engineering department manager.

KEY Engineering, Inc. | Vice President | Hafeez Butt

Hafeez Butt

Vice President – Mr. Butt is a registered professional engineer with over 40 years of structural experience. He is also the structural engineering department manager.

KEY Engineering, Inc. | Treasurer | Debbie Fairbanks

Debbie Fairbanks

Treasurer – Ms. Fairbanks has over 30 years experience in the electrical engineering and design industry. She is also the instrumentation and electrical engineering department manager.

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