Insights

Market Leadership OSSA's established dominance in underground civil engineering, mining infrastructure, and hydroelectric projects presents opportunities to expand its service offerings to similar large-scale infrastructure projects across Europe and internationally seeking proven expertise in complex underground environments.

Technological Innovation The company's experience with advanced tunneling and underground construction positions it as a potential partner for clients adopting new technologies such as automation, digital twin simulations, or sustainable construction practices, enabling OSSA to offer integrated solutions in innovative project execution.

Sustainability Focus Given OSSA's involvement in major hydroelectric projects which emphasize renewable energy, there is potential to develop and market specialized solutions for green and sustainable underground infrastructure, appealing to clients aiming to meet environmental regulations and carbon reduction targets.

International Expansion With over 70 years of experience and a global reputation for complex underground projects, OSSA can leverage its expertise to target new markets with growing infrastructure demands, such as urban rail systems, resilient power networks, and underground urban development projects.

Strategic Partnerships The company’s extensive project portfolio and technical capabilities make it a valuable partner for collaboration with engineering firms, local governments, and energy providers looking for reliable contractors to deliver high-quality underground and hydroelectric developments in competitive bidding scenarios.

OSSA Tech Stack

OSSA uses 8 technology products and services including MySQL, Twemoji, jQuery, and more. Explore OSSA's tech stack below.

  • MySQL
    Database
  • Twemoji
    Font Scripts
  • jQuery
    Javascript Libraries
  • Yoast SEO
    Search Engines
  • YouTube
    Video Players
  • Google Analytics
    Web Analytics
  • Microsoft ASP.NET
    Web Frameworks
  • prettyPhoto
    Web Tools And Plugins

OSSA's Email Address Formats

OSSA uses at least 1 format(s):
OSSA Email FormatsExamplePercentage
First.Last@ossaint.comJohn.Doe@ossaint.com
70%
First.Middle@ossaint.comJohn.Michael@ossaint.com
30%

Frequently Asked Questions

Where is OSSA's headquarters located?

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OSSA's main headquarters is located at 1 c Isla Graciosa 2º Piso San Sebastián de Los Reyes, Community of Madrid 28703 Spain. The company has employees across 6 continents, including South AmericaEuropeNorth America.

What is OSSA's phone number?

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You can contact OSSA's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is OSSA's stock symbol?

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OSSA is a publicly traded company; the company's stock symbol is CAPL.

What is OSSA's official website and social media links?

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OSSA's official website is ossaint.com and has social profiles on LinkedIn.

What is OSSA's NAICS code?

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OSSA's NAICS code is 237 - Heavy and Civil Engineering Construction.

How many employees does OSSA have currently?

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As of May 2026, OSSA has approximately 477 employees across 6 continents, including South AmericaEuropeNorth America. Key team members include Ceo: C. P. C.Cfo: D. O. C.Owner/President: J. B. M.. Explore OSSA's employee directory with LeadIQ.

What industry does OSSA belong to?

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OSSA operates in the Civil Engineering industry.

What technology does OSSA use?

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OSSA's tech stack includes MySQLTwemojijQueryYoast SEOYouTubeGoogle AnalyticsMicrosoft ASP.NETprettyPhoto.

What is OSSA's email format?

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OSSA's email format typically follows the pattern of First.Last@ossaint.com. Find more OSSA email formats with LeadIQ.

When was OSSA founded?

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OSSA was founded in 1952.
OSSA logo

OSSA

Civil EngineeringCommunity of Madrid, Spain201-500 Employees

OSSA is a civil engineering specialist focused on underground construction across mining, tunneling for road, rail, and subway systems, as well as underground hydraulic projects and hydro power plant tunnels. With more than seven decades of specialization and ongoing innovation, the company has earned an international reputation for delivering complex underground works in challenging soils, remote locations, and under tight budgets and schedules.
Based in San Sebastián de Los Reyes, in the Community of Madrid, OSSA is a mid-sized contractor with an international footprint in underground civil engineering. It serves mining groups such as coal, copper, iron and potash operators, and designs and builds vertical shafts, tunnels, large caverns, underground workshops, and pump stations for underground infrastructure. The company has completed seven major underground hydroelectric plants, including Cortes-La Muela in Valencia and San Esteban in Orense. Founded in 1952, OSSA has a long history of undertaking complex projects in difficult conditions.

Section iconCompany Overview

Headquarters
1 c Isla Graciosa 2º Piso San Sebastián de Los Reyes, Community of Madrid 28703 Spain
Phone number
Stock Symbol
CAPL
NAICS Code
237 - Heavy and Civil Engineering Construction
Founded
1952
Employees
201-500

Section iconFunding & Financials

  • $500M$1B

    OSSA's revenue is estimated to be in the range of $500M$1B

Section iconFunding & Financials

  • $500M$1B

    OSSA's revenue is estimated to be in the range of $500M$1B

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