AESA (A-Evangelista SA) is a prominent Argentine company founded in 1948, specializing in engineering, manufacturing, construction, operation, and maintenance services for the oil, gas, and energy sectors. Based in Jos� Mar�a Ezeiza, Argentina, AESA employs between 5,001 and 10,000 people and generates annual revenues estimated between $500 million and $1 billion. The company is recognized for its integrated approach to EPC (Engineering, Procurement, and Construction) project execution, which includes equipment manufacturing and process module fabrication.

AESA offers a range of services, including engineering design and consulting, procurement and construction management, and operation and maintenance services. The company manufactures industrial equipment and modular process units tailored to client specifications. AESA serves clients in the oil, gas, and petrochemical industries across Argentina and neighboring countries, focusing on upstream, midstream, and downstream projects. With a commitment to technological innovation and compliance with international standards, AESA enhances operational efficiency and sustainability in energy infrastructure development.