1. Front-End Engineering Design (FEED)
2. Conceptual engineering and feasibility studies
3. Detailed engineering design
4. Process engineering
5. Mechanical engineering
6. Electrical engineering
7. Instrumentation & control engineering
8. Civil & structural engineering
9. Pipeline engineering
10. Piping engineering
11. HVAC engineering
12. Fire protection engineering
13. HSE engineering
14. Environmental engineering
15. Reliability engineering
16. Asset integrity engineering
17. Corrosion engineering
18. Flow assurance studies
19. Process safety engineering
20. Energy-efficiency engineering

21. Non-Destructive Testing (NDT)
22. Ultrasonic Testing (UT)
23. Radiographic Testing (RT)
24. Magnetic Particle Testing (MT)
25. Dye Penetrant Testing (PT)
26. Visual inspection
27. Welding inspection
28. Pressure vessel inspection
29. Tank inspection
30. Pipeline integrity inspection
31. Corrosion monitoring
32. Cathodic protection inspection
33. Structural integrity assessment
34. Fitness-for-service assessment
35. Risk-Based Inspection (RBI)
36. Remaining-life assessment
37. Asset integrity management

38. Rotating equipment maintenance
39. Pumps and compressors maintenance
40. Turbine maintenance
41. Valve maintenance and refurbishment
42. Pressure equipment maintenance
43. Preventive maintenance
44. Predictive maintenance
45. Condition monitoring
46. Vibration analysis
47. Thermography
48. Lubrication management
49. Shutdown/turnaround maintenance
50. Mechanical overhauls

51. Electrical installation
52. Electrical maintenance
53. Generator maintenance
54. Transformer maintenance
55. Switchgear maintenance
56. Motor testing and maintenance
57. Instrument calibration
58. PLC/SCADA services
59. Distributed Control System (DCS) support
60. Emergency shutdown system testing
61. Fire & Gas system maintenance
62. Automation and control systems
63. Electrical protection studies
64. Power-quality studies

65. Pipeline construction
66. Pipeline maintenance
67. Pipeline inspection
68. Pipeline pigging
69. Intelligent pigging
70. Leak detection
71. Pipeline coating
72. Pipeline corrosion protection
73. Cathodic protection
74. Pipeline integrity management
75. Hydrotesting
76. Pressure testing
77. Pipeline repair and rehabilitation

78. Structural steel fabrication
79. Piping fabrication
80. Skid fabrication
81. Pressure vessel fabrication
82. Tank fabrication
83. Modular fabrication
84. Welding services
85. Offshore fabrication
86. Plant construction
87. Mechanical erection
88. Electrical installation
89. Instrumentation installation
90. Civil works

91. Process optimization
92. Production optimization
93. Well testing
94. Well intervention support
95. Artificial lift solutions
96. Metering and allocation
97. Process-control optimization
98. Production surveillance
99. Debottlenecking
100. Process plant optimization