What we do


Expertise, critical thinking and efficiency are the foundation of our Engineering Services.

From traditional technical engineering and design services to project services and staffing services, Sigma brings our own unique and refreshing approach that our clients love.

Our Engineering Services

Offers the Following:



Our Civil and Structural Engineering Department Offers the Following Areas of Expertise:

  • Concrete/Steel Structural Engineering and Design
  • Area Containment and Drainage
  • Structural Deterioration Remediations
  • Blast Resistant Structural Engineering
  • Sheet Pile Retaining Systems Design
  • Finite Element Analysis
  • Total Station Surveying
  • 3D Scan Processing/Modeling
  • Mathcad Calculation Programming
  • Site Development
  • Structural Retrofits
  • Geotechnical Consulting
  • Shallow & Deep Foundation Design
Electrical & Instrumentation

Our Electrical & Instrumentation Department Includes the Following Areas of Expertise:

  • Arch Flash Studies
  • P&ID Development Coordination
  • Feasibility Studies/Front-End Engineering
  • Instrumentation Specification and Requisitioning
  • Electrical equipment specification and requisitioning
  • Electrical/Instrumentation Construction Work Packages
  • Design/Constructability/HAZOP Review Participation
  • Field Instrument Specification, Design, & Installation
  • Electrical Load Flow, Relay Coordination and Short Circuit Studies (ETAP)
  • HV/LV Power Distribution (Equipment, Cable Trap, Conduit, Cable Sizing)

Our Mechanical Department Includes the Following Areas of Expertise:

  • Equipment Specification and Requisitioning
  • Pipe Stress Analysis
    • Process Piping
    • Liquid Transfer
    • API-610
    • WRC-107/297
    • PSV Thrust Force-API-520, ASME B31.1 App. II
  • Pressure Vessel Analysis and Design
  • Integrated Mechanical Support
  • Tank Modeling/Calculations-API-620/API-650/UL-142 Storage Tanks
  • Vessel Modeling/Calculations-ASME Sect. VIII Pressure Vessels, Exchangers, Towers, Strippers
  • Tank Fire and Fall Protection Design
  • Engineering & Piping Specification Development

Our Piping Department Include the Following Areas of Expertise:

  • 3D Design and Modeling
  • Laser Scan Integration
  • Front-End Design and TIC Estimating
  • Construction, Turnaround, and Emergency Support
  • P&ID Verification Audits
  • State of the Art Design Equipment and Software

The Sigma Process Department Includes the Following Services:

Engineering Analysis & Equipment Design

  • Process Simulation
  • Hydraulic Calculations
  • Equipment Sizing/Troubleshooting
  • Safeguarding/Relief Valve Analysis
    • New Project Installations
    • Debottlenecking Impact Analysis
    • Existing System Revalidation and Mitigation
    • Flare Network Analysis
    • Custom Dynamic Modelling
    • PHA/Audit Support
    • MOC/Maintenance/Turnaround Support
  • Petroleum Production & Refining Operations
  • Batch & Continuous Chemical Reaction Systems
  • Fertilizer Plant Experience
  • Various Petrochemical Unit Operations
Survey Laser Scan

Sigma offers self-performed laser scan capabilities with company-owned equipment.  Our survey laser scan services include:

  • Topographic
  • Project Control
  • Laser Scanning
  • Construction Layout
  • QA/QC


Sigma’s Project Services staff is comprised of experienced and knowledgeable specialists that help support our core technical engineering and design services. The work performed by this team forms the foundation of the incredible service we provide to our clients. Our project services team includes:

  • Project Procedures
  • Execution Plan
  • Project Controls Plan
  • Safety (HSE) Plan
  • Quality Plan
  • Procurement Plan
  • Communication Plan
  • Estimate Plan
  • Client Expectation Surveys
  • Client Satisfaction Surveys


Though we may call it “staffing,” Sigma is the polar opposite of a traditional staffing agency. The employees we place on-site are an extension of our company and are instilled with the same culture, core values, and mission that drives our in-house team.

We offer technical and non-technical solutions for clients across the country in the Refining, Chemical, Fertilizer, Specialty Chemical, Petrochemical, Manufacturing, and Industrial markets for the following skill sets:

  • Project Engineers
  • Discipline Specific Engineers, Drafters, and Designers
  • Process Engineers
  • Project and Construction Managers
  • Construction Coordinators
  • Material Coordinators
  • Procurement Professionals
  • Office Services

For further details on Sigma Staffing please contact us.

Contact Us