A live sound engineer creates a mix for a live music or sound event. He/She would mix the different audio sources to create a suitable mix and monitor it to make sure that it sounds good. He/She may also be involved in the setup of mics, speakers, amps, and the mixer itself.
A live sound engineer has the responsibility of making sure that all of the audio (sound) at and event or concert is good and equipment is running well. THis person normally would spend all of their time at the main mixer setting and adjusting the sound as needed.
A live sound technician and live sound engineer are essentially the same job. "Engineer" has a connotation of someone that is more experienced/has more training than a technician. That being said, there is no committee that designates titles in the audio entertainment industry, such as those in the medicine field where each title specifies a certain level of education/skill.
There are quite a few things that a sound engineer can do. These sound engineers have the ability to manipulate sounds.
They are sound engineers. These people usually fall into 3 catagories based on what exactly they do. Recording engineer, mixing engineer, mastering engineer.
Robert Parker - sound engineer - died in 2004.
Robert Parker - sound engineer - was born in 1936.
Tour manager, live sound engineer, roadie, merchandise vender.
Jack Solomon - sound engineer - was born on 1913-03-08.
Peter Sutton - sound engineer - died on 2008-08-24.
John Pritchett - sound engineer - was born on 1947-03-29.
Bill Porter - sound engineer - was born on 1931-06-15.
Bill Porter - sound engineer - died on 2010-07-07.
Chris Newman - sound engineer - was born on 1940-02-17.