According to a 2008 estimate total employment is 450,100 in Mississauga.
Major Employers in the city include quite a few head offices of major companies.
Generally the two main was you can get to work are by driving or using Public Transit. Most people commute to work. However if you are fortunate enough to be able to walk or bike to work you can save a lot of time and money... see How long does your daily commute add up to... to see how much time you could save.
There are number of employment agencies that can help you find work. Many people use job websites like Monster or Workopolis. Also you can check the company websites for job postings.