About us · History, quality, clients and partners

History

SESTRA was founded in 1986 in Andoain (Gipuzkoa) by a multidisciplinary team of engineers and architects and has since developed and taken part in more than 2,500 civil engineering and architecture projects and site supervisions.

Among them are emblematic local projects such as the new road accesses to San Sebastián, the AP-1 motorway, the widening of the AP-8 to three lanes, new N-I junctions, town bypasses, the new cycle-lane network of San Sebastián and Gipuzkoa, the Donostialdea metro, several water tanks and pumping facilities, the first Anoeta Stadium and the Ilunbe leisure centre.

SESTRA has also designed and taken part in industrial buildings and works for Grupo Indaux, ArcelorMittal, Sprilur and Gureak; residential buildings for Playa Gaztetape, Iaonel and Eginandia; public buildings such as the Azkoitia Elkargune or the Labegaraieta sports centre in Bergara; and healthcare facilities for Osakidetza.

Internationally, SESTRA has taken part in several road, interchange and civil works projects in Africa, South America and the USA.

Equipo técnico de SESTRA trabajando sobre planos

1986
Founded in Andoain by a multidisciplinary engineering and architecture team.
2008
Integrated Quality System: quality, environment, health and safety.
2022
Consolidation of a management model focused on excellence and social commitment, after fully integrating equality and sustainability into the quality system.
+2,500
Civil engineering and architecture projects and site supervisions.
Today
Projects in the Basque Country, across Spain, Africa, South America and the USA.

Engineering and Architecture in progress

Main works 1986–2016

Thirty years of civil works, hydraulics and architecture collected in our catalogue (in Spanish).

Download catalogue · PDF

SESTRA’s goal is to provide a quality service. To do so, we rely on a team of highly motivated professionals who are attentive to the current needs and expectations of society.

We adapt to the different processes our clients require, meeting their requirements throughout the work and taking them into account at all times.
These goals can only be achieved through the effort and involvement of everyone at SESTRA, fostering their personal and professional development through training, communication and participation in a positive, team-oriented environment that facilitates and promotes equal treatment and opportunities for men and women.
SESTRA’s Management is committed to ensuring the effective consultation and participation of workers and, where they exist, their representatives, in the design, planning, implementation, performance evaluation and continuous improvement of the Occupational Health and Safety Management System.
SESTRA’s Management is committed to acting consistently with this Policy, complying with the legal and regulatory requirements of our activity and of the projects we develop throughout their life cycle, respecting and minimising environmental impacts, and remaining constant in the prevention of occupational risks to eliminate hazards and reduce OHS risks, including outsourced functions and processes.
It is likewise aware of climate change and its impact on the organisation, its activities and society. It therefore aims to contribute to climate change mitigation and adaptation by progressively adopting environmental commitments, measures and objectives appropriate to its activity.

All of this with the ultimate aim of improving the satisfaction of our clients, environmental performance, occupational health and safety and the wellbeing of the people at SESTRA Ingeniería y Arquitectura, S.L.

Management · Revision 04 · June 2026