Depends on where you are, what qualifications you have, and what field you fancy. It always helps to be fully qualified and bring about 2 to 5 years of relevant outside experience. Fully qualified works like this:
In the USA and Canada, you can be a university instructor, lecturer, or administrator if you have a bachelor's degree, and you can become a professor if you have at least a master (PhD usually required, and won't be handed out straight, will require research track record, publications, teaching experience).
In the UK, doing anything at University level requires at least a master, PhD preferred, conditions as above.
In New Zealand, a diploma or bachelor are enough for a fulltime position at a Polytechnic, and universities require master's degree or PhD.
The more hands-on the field, the less importnce is placed on the academic side. IT or design, architecture, are very hands-on.
You could try www.jobs.ac.uk or www.coroflot.com to find those jobs. Otherwise, find the website of a university you are interested in and observe their recruitment/ staffing/ Personnel/ HR/ Human Resources pages.