Having a CELTA certificate, along with a university degree, is your guarantee for employment world-wide. It is highly regarded in all countries and in some countries it is the standard qualification for employment as an English language teacher.
CELTA graduates find jobs in private language schools in Canada and abroad, at colleges and universities, at international elementary and secondary schools, doing in-house corporate English lessons, with humanitarian organizations involved in overseas projects and with the JET (Japan Exchange and Teaching) programme.
For information on recognition of teaching certificates generally in Canada, visit the TESL Canada site at http://www.tesl.ca/. For recognition of teaching certificates in Ontario, visit the TESL Ontario site at http://www.teslontario.com/.
If you do not possess a completed university degree, even with a CELTA, you will not qualify for employment at any of the Canadian language institutes, either public or private, that are members of Languages Canada - you may qualify for employment with private language schools that are not members of Languages Canada
With a university degree and a CELTA, you will not normally qualify for employment with public-sector institutions that require their teachers to have TESL Ontario certification - such institutions generally receive government funding or provide LINC training
You will come across many different acronyms for types of qualifications. TEFL (Teaching English as a Foreign Language), TESL (Teaching English as a Second Language) and TESOL (Teaching English to Speakers of Other Languages) are all common acronyms that mean essentially the same thing. All of these refer to English language teaching qualifications in general.
CELTA is the brand name for the University of Cambridge's English language teaching qualification.
For overseas jobs, in most cases this means the CELTA or another certificate that is offered by an internationally known institution and that has international recognition.
For jobs in Canada, this will usually mean a certificate that has recognition from TESL Canada or a provincial TESL organization -it's best to contact employers directly to find out which standard they are seeking.
You may also see alternate names for the CELTA such as RSA, CTEFLA or Cambridge qualifications.