His professional practice has focused on Public Administration, particularly in the Public Sector, Infrastructure, and Energy. His knowledge of technical aspects in state regulations gives him special expertise in matters related to state procurement and contracting, Public-Private Partnerships, as well as the preparation and review of bidding documents, terms of reference, and administrative contracts.

Engels has participated in Offer Evaluation Committees (CEO) and High-Level Special Committees (CEAN), recommending awards or cancellations and resolving appeals submitted by the parties involved. He has defended the Public Administration before the Administrative Litigation jurisdiction and implemented the application of review criteria for administrative resolutions extracted from case law, in order to maintain the firmness of resolutions adopted in procurement and contracting processes.

Engels has advised public and private companies, both national and international, in project structuring, public-private partnerships, management of public-private partnership contracts, preparation of bidding dossiers, competitions, as well as in the fields of commercial and administrative law.

Additionally, he has represented companies and public institutions in trials and proceedings before different authorities (courts, municipalities, and other institutions) and is a specialist in procurement under the regulations of the World Bank, IDB, European Union, KFW, and BCIE.