choosing education credential authority canada

[Rochanab]

HI HOW DO I CHOOSE THE ECA AUTHORITY...CAN ANYONE HELP

I FALL UNDER 2171 SYSTEMS ANALYST. WHICH ASSESSING AUTHORITY IS BETTER TO ASSESSING THIS. I KNOW THAT THE OFFICIAL SITE DORSET HAVE A DESIGNATED ASSESSING BODY FOR THIS. ANYONE KNOWS WHICH ECA I SHOULD GO FOR