srp foreman joshua cohen makes this sound like no big deal. >> it's just a normal job for us. it's like a bus driver driving his bus. that's what we do. >> reporter: no doubt it takes a certain kind of person to do this job. each of these towers are 150 feet in the air and there is no room for error. always within view and earshot, the buzzing high-voltage lines. >> these are 500,000 v powerlines. for sure, we need to make sure that we are doing things the get to this point. >>we all like going home to our families. >> reporter: what exactly are they doing on these towers? >> looking for broken insulators, loose hardware, conductor issues, anything that could affect the reliability of our power. >> reporter: for the most part they are just documenting issues they see pic if there is something they can fix on the spot, they well. if it's a bigger, critical issue, they will come . out ahead of things and hopefully we will find the problem before it actually becomes a problem. we can fix it before it affects the customers. >> reporter: the adrenaline pumping got the work rules on