Civil engineering
Roads, interchanges, railways, cycle lanes, urban mobility and stabilisation works.
Engineering · Architecture · Since 1986
Engineering and Architecture at the service of society.
Civil works, hydraulics and architecture projects delivered with technical rigour, an integrated vision and a commitment to the viability of every intervention.
Who we are
At SESTRA we develop civil engineering and architecture projects with technical rigour, an integrated vision and a commitment to the viability of every intervention.
We work for public authorities, companies and private clients, supporting each project from the initial analysis and technical planning through to construction, site supervision and final follow-up.
From Gipuzkoa, we take part in local, national and international projects, adapting to the regulatory, functional, construction and economic constraints of each context. Our way of working combines technical solvency, multidisciplinary coordination and a close, responsible relationship with every client, developer and stakeholder.
The SESTRA team brings together highly experienced professionals and technical staff specialised in different disciplines, allowing us to take on civil works, architecture, urban planning, hydraulic works and technical assistance projects with confidence. In every commission we look for precise, efficient and proportionate solutions, with attention to detail, schedule control and a commitment to quality.
We understand engineering and architecture as disciplines at the service of people, the territory and the proper functioning of infrastructure and built spaces. That is why we develop projects that not only solve technical needs but also deliver value, durability and long-term usefulness.
About us- 40 years of experience Founded in 1986
- +2.500 projects and site supervisions Civil engineering and architecture
- 3 continents Europe, Africa and the Americas
- 5 certifications ISO 9001 · 14001 · 45001 · Efitecnic · Emakunde
Areas of work
Three disciplines, one technical standard.
Featured projects
Works that are already part of our reality.
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Replacement of the Gabolats bridge in Soraluze
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Urban development of AOU 6 – Olatzar (Lezo)
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Marrutxipi junction on the GI-20 San Sebastián bypass
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North Tarrant Expressway, Fort Worth, Texas
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Phase 1 – Viaduct over the Obetsebi Lamptey interchange, Ghana
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Travelift extension at Hondarribia marina
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Labegaraieta sports centre
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Olatzar private housing (Lezo)
- View projects
We are continually faced with a series of great opportunities brilliantly disguised as insoluble problems.
Where we work
From Gipuzkoa to three continents.
We work on local, national and international projects: roads, interchanges and civil works around the world.
Commitment to quality and equality
An integrated, certified management system.
Since 2008 we have worked under an Integrated Quality System covering quality assurance, environmental management, occupational health and safety, and efficiency.
In 2022 we drew up our first equality plan, and since 2024 we have been an Emakunde Collaborating Entity for Equality between Women and Men.
- ISO 9001:2015
- ISO 14001:2015
- ISO 45001:2023
- Efitecnic
- Equality
Read our integrated policy
They trust us
Institutions, town councils and companies that trust SESTRA.
ADIF , Aguas de Gipuzkoa – Gipuzkoako Urak , Aguas del Añarbe-Añarbeko Urak, S.A. , Anoeta Kiroldegia , Arabako Lanak, S.A. , Aretxabaletako Industrialdea, S.A. , Autoridad Portuaria de Pasajes , Bergarako Industrialdea, S.A. , Beterri-Kostako Industrialdea S.A. , Bidasoa Oarsoko Industrialdea, S.A. , Bidegi, S.A. , Bidelan Gipuzkoako Autobideak, S.A. , Bilbao Ría 2000 , Buruntzaldeko Industrialdea, S.A , Confederación Hidrográfica del Cantábrico , Consorcio de Aguas de Gipuzkoa-Gipuzkoako ur kontsortzioa , Consorcio de Aguas del Gran Bilbao , Costas-Servicio de Costas de Gipuzkoa , Deba Beheko Industrialdea, S.A. , Deba Goieneko Industrialdea, S.A. , Delegación Territorial de Puertos del Gobierno Vasco , Diputación Foral de Alava , Diputación Foral de Bizkaia , Diputación Foral de Gipuzkoa , EITB , Etorlur Gipuzkoako Lurra, SAU , Euskadiko Kirol Portuak, S.A. , Euskadiko Udalen Elkartea , Euskal Trenbide Sarea , Eusko Trenbideak / Ferrocarriles Vascos S.A. , Aceralia Perfiles Bergara, S.A. , Aceralia Perfiles Madrid, S.L. , Aceralia Perfiles Olaberria, S.L. , AMR Refractorios S.A. , Antzibar, S.A. , Aquarium Aquadonosti, S.L. , Arcelor SSC España, S.A. , ArcelorMittal – Madrid, S.L. , ArcelorMittal Bergara, S.A. , ArcelorMittal Distribución , ArcelorMittal Gipuzkoa, S.L.U. , ArcelorMittal Olaberria, S.L. , CAF, Irizar, Danobat, Ferrovial, Dragados, Grupo TRAGSA, Neinor, CIC Nanogune
FAQ
What people usually ask us.
What kind of projects does SESTRA deliver?
SESTRA delivers design and site supervision for civil engineering (roads, interchanges, railways, cycle lanes, urban development, slope stabilisation), hydraulic works, ports and coasts (water supply, sewerage, pumping, channelling, tanks, breakwaters) and architecture and urban planning (industrial, residential and public buildings, and urban planning).
Who does SESTRA work for?
Public authorities (Basque Government, provincial councils, town councils, water agencies, Bidegi, ETS…), companies and private clients. We support each project from the initial analysis to site supervision and final follow-up.
Where is SESTRA based and where does it work?
Our office is at Zuatzu Kalea 2, Donostia-San Sebastián (Gipuzkoa, Spain). We work at local, regional and national level, and we have also taken part in international projects in Africa and the Americas.
Which certifications does SESTRA hold?
We have an Integrated Management System certified to ISO 9001 (quality), ISO 14001 (environment) and ISO 45001 (occupational health and safety), plus Efitecnic, and we are an Emakunde Collaborating Entity for Equality between Women and Men.
How can I work or do an internship at SESTRA?
Send us your CV through the “Join us” page. We regularly collaborate with universities and vocational schools in engineering, architecture and drafting.