There was a time when all a good salesperson needed was a smile, a shoe shine, and a case full of samples. However, today's sales representatives must be well-versed in the technical aspects of their products as well as those of their competitors. Technical sales agents are frequently on the cutting edge of science and technology when selling products such as computers, lasers, microchips, software, space-age polymers, novel medications, or chemical compounds. 

To be successful in this position, you must have a distinct set of skills. You must be able to discuss a product's characteristics and benefits with the authority of an engineer. You must be prepared to explain why it is superior than competitors' products. Finally, you must be able to complete the transaction. 

Understanding and keeping up with constantly changing technologies is time-consuming and difficult work. However, if you are willing to make the necessary commitment to face this challenge and enjoy selling, you can make a very decent livelihood as a technical sales representative.