Insights

Underground Expertise OSSAs leadership in underground civil engineering, tunneling, and hydro power projects positions them as a prime partner for large-scale infrastructure expansions, including road, rail, subway, and hydro projects in Europe. Target opportunities include design-build and EPC collaborations with utilities and transportation authorities undertaking new tunnels or refurbishments.

International Track Record With a 70-year history and recognition for complex projects in difficult soils and remote sites, OSSA can be approached for international tunneling opportunities, cross-border tenders, and turnkey projects where risk sharing and proven execution are valued.

Hydro Power Focus OSSAs involvement in major underground hydroelectric plants suggests sales potential in turbine-penstock tunnel retrofits, efficiency upgrades, and new pumped-storage or run-of-river schemes. Engage for engineering services, long-term maintenance, and modernization contracts.

Mining Infrastructure Footprint Experience in vertical shafts, adits, caverns, and underground facilities for coal, copper, iron, and potash indicates opportunities to offer specialized rock support, ventilation, and underground construction solutions to mining operators looking to expand capacity or enhance safety.

Digital & Efficiency Levers OSSAs use of MySQL, analytics tools, and web visibility suggest potential for data-driven project optimization, BIM-enabled collaboration, and performance-monitoring services. Propose value traps around project dashboards, scheduling optimization, and efficiency analytics to prospective clients.

OSSA Tech Stack

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

  • MySQL
    Database
  • Google Fonts API
    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

Media & News

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

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 July 2026, OSSA has approximately 480 employees across 6 continents, including South AmericaEuropeNorth America. Key team members include Ceo: C. P. C.Cfo: D. O. C.Director General: E. M. 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 MySQLGoogle Fonts APIjQueryYoast 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

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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