Kaspersky antivirus administration, administration of local infrastructure servers, for employees and company CRM's, active directory administration, on-site support for the company's own users and also remotely, administration of VOIP Telephony in the company, configuration of developer teams with UBUNTU, support for MacOs and Windows.
Administration of Kaspersky Antivirus, filling out alerts, evidence of reports made by the antivirus on users, port permissions for certain users. I currently use Cynet