In 1989 he began his career as Foreman for Verdenova SpA, Rome, monitoring road vegetation maintenance works along the A14 Bologna-Bari-Taranto highway.

In 1990 first as Site Manager, then as Technical Director and finally as Managing Director of Stil Verde Srl, Ravenna, he managed works and logistics of construction sites from the company, such as the A4 Brescia-Padova (green maintenance), the Messina-Palermo highway (landscape management) and the Milan-Genoa highway (installation of noise barriers).

In June 1995 Valerio Molinari founded “Ecogest Engineering Srl” in Ravenna, operating in the field of environmental restoration and maintenance of roadside vegetation along transportation infrastructure.

In 2016 Ecogest was turned into a joint stock company, positioning itself as a leader in the sector and working for major Italian highway concessionaires and the state network. Over the years the company has established its position and then its leadership in the Italian market, working for the main Italian freeway concessionaires, as well as for the railway groups in charge of building the Rome-Naples, Turin-Milan and Milan-Genoa high-speed lines and for the state network through ANAS.

In September 2021, Valerio Molinari became a member of the Board of Directors of AISCAT. In 2020 Valerio Molinari founded the Climate Change Study Centre, through the family holding company “Greenway Group,” which monitors the consequences of climate change, with particular attention to the refluence on maintenance and the state of conservation of highway infrastructure.

Since 08/03/2023 he has been a founding partner and member of the Board of Directors of “Fondazione MAC – Audiovisual Memories of Catholicism” born from an initiative of Monsignor Dario Edoardo Viganò, at the express wish of His Holiness Pope Francis I. Since 28thJune 2023 he has been a member of the Board of Directors of the IRF- International Road Federation of Geneva – Switzerland