Visitors positions

What positions do the visitors have?

Electrician
Low voltage installation techician
Installation manager
Service technician
Design/Construction
Project Manager
Construction manager
Energy adviser
Electrical consultant
Building/technical consultant
Lighting designer
Purchasing
Management
Salesman/marketing man
Architect
Technical Manager
Security/Safety manager
Operations and maintenance manager
Machine/insturment technician
Planner/organiser
Line installer
Property manager
Property caretaker
Teacher/trainer