Carlo Tresoldi began his career at Università Pro-Deo (now LUISS) in Rome, as a voluntary assistant to the Chair of Economic Development and later to the Chair of Monetary Economics.
In 1966, he joined the Bank of Italy where, in 1980 he was assigned to the Department of Studies until 1988, when he became Head of the Advances, Discounts and Compensations Department.
In 1999, Tresoldi was appointed Central Director of the Payment Systems and Treasury Area at the Bank of Italy.
He collaborated in the construction of the econometric model M1BI, with particular reference to investments in residential real estate and was one of the principal contributors to the construction of the block of equations that refer to the real sector of the M2BI model.
During the years prior to the introduction of the Euro, he contributed to the definition and application of a number of innovative changes to the inter-bank cycle of payment instruments, cash and securities settlement systems. During the various phases of preparation for the changeover to the Euro, Tresoldi also coordinated the activities to modify the payment systems, the operations of financial intermediaries, market bodies and the inter-bank network, to make them compatible with the new scenario.
More recently, Tresoldi collaborated in the implementation of the TARGET2 project and the definition of the new SEPA-compliant payment instruments.
He actively promoted the transformation of public payments to electronic platforms, and he conceived and directed the realization of SIOPE, the information system for the operations of the public sector bodies.
From 1988 to 2001, he was a member of the Board of Directors of SIA.
In 2007, Carlo Tresoldi was appointed Chairman of SIA.