Consulting Services in Civil and Structural Engineering

Established in 1969, LYASA S.A. is a consulting engineering firm from Buenos Aires, Argentina, whose main activities have been the design, inspection and management of civil works.

The firm has highly qualified experience in civil engineering jobs; in fact, LYASA S.A. first partners came from the construction industry. The Company has been involved in the design and supervision of large structures for buildings, bridges and navigation locks.

It has also worked in highways, harbors, silos and has carried out several important structural rehabilitation jobs. In the last decade LYASA S.A. has engaged successfully in many multidisciplinary projects and was responsible for the civil works of important industrial plants..

Yentel, Hugo B.

President of LYASA, is an Argentine national. He studied Civil Engineering in the University of Cordoba, Argentina and the University of California, (UCLA), USA. After working for an important construction firm (Christiani y Nielsen from Argentina), he moved to the Consulting Engineering activity, founding LYA in 1969. Mr. Yentel was in charge of important structural projects for large buildings, and has directed interdisciplinary working teams for the design of industrial plants and structural rehabilitation jobs.

Lavallaz, Pablo E.

Is a Swiss born Civil Engineer. He has also argentine nationality and studied in the Buenos Aires University. After working for an important construction firm (Christiani y Nielsen from Argentina) were he occupied the position of Chief Engineer, he moved to the Consulting Engineering activity, founding LYA in 1969. He has been involved in important structural jobs for architectural projects, harbor and ports, bridges and structural rehabilitation..


Structures for Buildings
and Architectural Works


New Building for the Argentine National Bank

La Nación Building

Galicia Bank Building

Catalinas Plaza Tower

Bouchard Plaza Tower

La Buenos Aires Building

Catalinas Norte Building

Pirelli Building

Educational and Art

The Blue Whale

University of Buenos Aires - School of Economics

San Luis University Campus

National University of La Rioja


Intercontinental Hotel & Casino Mendoza

Sheraton Hotel Mendoza

Westin Lagunamar Ocean Resort

Meliá Hotel Buenos Aires

Emperador Hotel

Sheraton Hotel Pilar

South Convention Center

Sheraton Hotel Buenos Aires

Libertador Hotel


Bicentennial Hospitals

Elizalde Hospital

Medical Institute Finochietto

Parking lots

Underground Parking for Transport Regulation near the Presidental Building

Plaza Libertad Parking Underground

Plaza Houssay Parking Underground

Residence Buildings

Olimpic Village

Riverview Buildings

2120 Ayacucho St. - Posadas

Unimev III - Mendoza


Rosario Shopping Mall

Chateau Carreras Stadium

Catamarca Airport


New Hangar 5 for Large Airplanes and Auxiliary Buildings

Potable Water Plant in Tigre

Petroquímica Cuyo - Addition

Soybean Storage Silo for Cargill


Papelera del Plata S.A.

Silarsa S.A. - Plant for the production of Metallic Silicates

C. Campolonghi S.A.

GTE Sylvania S.A. - Glass Factory Plant

Petroquímica Cuyo - Polypropylene Plant

Induclor S.M. - Off-Site Plant

Petropol S.M.

Aluar - Aluminum Plant

Bridges and

Paseo del Bajo

Bridges Over the Morón Creek

Bridge Over the Capayan River

Nicolás Avellaneda Bridge

Northern Access to Buenos Aires (Autopista del Sol)

Bridges Over the Negro River

Bridge Over the Pescado River

Bridge Over the Loro Huasi River

Bridge on the Setubal River

Bridges on the #12 Highway

Bridge Over the Grande River

General Urquiza Railroad

Rosario (Santa Fe Province) - Southern Access To The Port

Highway #55 (Section El Arenal-Rosario de la Frontera)

Papelera del Plata - Zárate Plant

Interprovince Highway in Río Negro Province

National #16 Highway (section El Quebrachal - Coronel Olleros)

Petropol S.M.

Off-Site (Induclor S.M.)

Ports and
Hydraulic Works

Cargill Grain Elevator in Ing. White

Shell Capsa Oil Refinery in Dock Sud - Mooring Facilities

Punta del Este Harbor Expansion

Water Intake Works for the City of Parana

San Antonio Este Harbor

Montevideo Harbor Expansion

El Tránsito Grain Loading Facilities

Navigation Locks on the Salto Grande Dam

Contact Us

+5411 4328-7727 +5411 4328-4467 +5411 4326-4311

Maipu 621 3º Piso (C1006ACG)
Ciudad Autónoma de Buenos Aires