Process 
· equipment sizing
· process simulation
· thermal calculation
· heat and material balance
· fluid – dynamic modelling
 
Instrumentation & Control
· control system architecture
· piping and instrumentation diagram
· valve sizing & instrument selection
· logic diagram & cause and effect matrix
· HAZOP / HAZID / SIL
 
Electrical
· cable sizing and routing
· system architecture
· device sizing & load analysis
· hazardous area classification
· lighting
· lightning protection
· earthing
 
Mechanical
· equipment design
· rotating machinery selection
· pressure vessel calculation (ASME I, ASME VIII, TEMA, VSR, EN, etc.)
· piping design (plant layout, 3D modeling/routing, stress analysis, isometric sketches, MTO, etc.)
· thermo-fluid dynamics with FEA
· equipment and relevant details analysis
 
HSE
· fire fighting
· acoustic design
· HAZOP / HAZID / SIL
· risk analysis

Civil
· hydraulic analysis
· geology study
· structural bridge design
· seismic assessment
· architectural design
· building information modelling (B.I.M.)
· HVAC design

Procurement
· material requisition for purchase
· technical bid evaluation
· expediting
· negotiation terms