My cousin (Mother's sister's son) is in Canada (citizen for 20+ years). Can he sponsor me & my wife? My designation "cost controller"/ wife (nurse) is not listed in canada occupational list.
It is unlikely. Having a relative in Canada may give you a few more points for a skilled worker assessment.
He cannot sponsor you as "family" however. You have to make your own application. Start here -> http://www.cic.gc.ca/ctc-vac/cometocanada.asp