'Do' and 'does' are both equally forms from the present indefinite tense in the verb 'to perform.' Which one particular you are going to use will mostly rely upon the sentence's topic. Their utilization is nearly similar, except for 1 occasion where You may use 'do' and never 'does.' https://financefeeds.com/gcex-appoints-stanislav-bunimovich-as-managing-director-for-apac-and-strategic-adviser-to-ceo-lars-holst/