Would you be comfortable giving some general details about what you do, in what kind of company you work and how long you've been in the industry? (It helps e to qualify your opinion in some way... )
Are you aware of others in your company or at other companies that also use cannabis as much as you? Or are you aware of people using narcotics/amphetamines?
Based on my understanding of the Bay Area, where I've worked, my usage is definitely more frequent and in larger dosages than 99% of employed individuals, but many people consume cannabis on a semi-regular basis. Dunno about the narcotics or amphetamines, it's not something I hear about regularly.
Yes, the people who do the physical installation and maintenance of antennas and lighting on cellular towers, for the most part. Also repair/maintenance for mobile radio systems (public safety), AM/FM radio, etc.