These careers can take on many forms:
Teaching in Schools, Universities and technical colleges.Physics graduates in the work force have reported that the most rewarding aspects of their current positions were the challenge of solving interesting and complex problems, working with people, seeing a project yield a successful and useful product, and developing new methods, processes and designs.
Research in University or Government laboratories.
Combined teaching and research responsibilities at some institutions.
Research at private industry laboratories.
Technical positions where applied physics techniques are used.
Managerial or marketing positions where a knowledge of physics is highly beneficial.
A host of other areas - some where you wouldn't think physics has any relevance at all (e.g. stock market finance)
For more information about jobs in physics, see the Canadian Association of Physicist's Physics Careers page.