The Projects and Infrastructure department of Castro Leiva Abogados stands out for providing comprehensive "End to End" consultancy in the structuring and execution of a wide range of projects, both public and private, including Public-Private Partnerships (PPPs). The firm provides support throughout the entire project lifecycle, from initial structuring to contractual execution, negotiation of financing and guarantees, as well as drafting and negotiating various contracts involved, such as construction, concession, operation, and maintenance contracts, among others.

Specialized sectors include transportation, telecommunications, hydrocarbons, energy, and public services. Additionally, the firm has excelled in the structuring and execution of road and airport infrastructure projects, as well as in the field of public transportation and project financing.

Castro Leiva Abogados has been one of the pioneering firms in legal advisory services for infrastructure projects in Colombia, especially in the road sector, actively participating in legal structuring, contractual execution, and financing of significant fourth-generation (4G) road projects. The firm has accumulated experience in road concessions from the earliest generations to the most recent, providing them with a broad and deep perspective on the challenges and history of infrastructure in the country.

A distinctive feature of Castro Leiva Abogados is its deep knowledge in both public law and infrastructure law, enabling them to offer solid advice on projects related to state planning, investment, and budgeting. This expertise is complemented by their participation in Construlegal, an alliance of firms specialized in infrastructure and construction law throughout the Americas, reinforcing their position as a reference in the sector.