Which are major/important subject in civil engineering?

As a civil engineer you must have knowledge of all the subjects which are mentioned below, When you work in construction industry as a civil engineer or site engineer or in some other position you must have a knowledge of all the subject. I must say if you ignore any of these subject then your a incomplete civil engineer. 

Following subjects are majors subjects in civil engineering:

1. Concrete technology
2. Surveying (I & II)
3. Structural analysis ( I&II)
4. Transportation engineering (which includes, Basic transportation & Highway engineering)
5. Geo-technical engineering (soil mechanics)
6. Environmental engineering
7. Fluid mechanics
8. Strength of material (Also known as Solid mechanics)
9. Water resource engineering ( I & II)
10. Building planning (urban/town planning)
11. Heavy construction and project management
12. Building materials
13. Design of Reinforced Concrete Structures
14. Design of steel structures (Which includes, Design of industrial structures)
15. Earthquake engineering 
16. Estimation and cost analysis
17. Bridge engineering 
18. Engineering mathematics ( I, II & III) 

If we talk about the important subjects in the civil engineering, then it’s depends upon the job profile. 

Town planner/urban planner

subjects: 

1. Building planning & Urban planning 
2. Water resource engineering ( I & II)

Site engineer 

Subjects:

1. Concrete technology
2. surveying
3. Environmental engineering
4. Building materials
5. Structural analysis
6. Strength of material
7. Design of Reinforced Concrete Structures (basic idea)
8. Design of steel structures (basic idea)
9. Geo-technical engineering
10. Earthquake engineering (basic idea)
11. Bridge engineering  (He should have basic idea of this subject, If he is site engineer in bridge construction )

Highway engineer

Subjects:

1. Building materials
2. Surveying (I & II)
3. Transportation engineering (which includes, Basic transportation & Highway engineering)
4. Strength of material
5. Concrete technology
6. Environmental engineering
7. Bridge engineering

Project manager 

Subjects:

1. Heavy construction and project management

Along with heavy construction and project management he must have knowledge of site engineer

Structural engineer

Subjects:

1. Structural analysis ( I&II)
2. Design of Reinforced Concrete Structures
3. Design of steel structures (Which includes, Design of industrial structures)
4. Earthquake engineering 
5. Bridge engineering
6. Strength of material
7. Geo-technical engineering (soil mechanics)
8. Concrete technology
9. Surveying (I & II)
10. Engineering mathematics ( I, II & III) 

Quantity surveyor/Cost estimator 

Subjects:

1. Estimation and cost analysis
2. Building planning (Most importantly Reading of drawing)
3. Concrete technology
4. Heavy construction and project management (basic idea)