Jana Žiarová started working completely from scratch at D. Trust Certifikačná Autorita, a.s., already while studying at the Comenius University in Bratislava. After completing her studies, she gradually worked through several positions from administrative to business manager. After more than 13 years, she worked her way up to become the CEO of DTCA. She has experience in designing solutions for individual customer requirements in the field of electronic signature.

She was part of the team in charge of providing the means necessary for the digitization of the judiciary in the eJustice project – a project for the gradual digitization of the judiciary. Furthermore she participated in equipping members of the Slovak Bar Association with means for electronic signature - individual printing of member chip cards, issuing qualified mandate certificates, and other services. She is currently working on spreading awareness about remote mobile signing and archiving of electronically signed documents.