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Venziltim Construction Company
Building a better world

A world leader in construction

Corporate strategy

Venziltim Construction Company operates in an increasingly complex and competitive environment that entails numerous risks and uncertainties, forcing the Group to adapt its strategy to the challenges and opportunities that arise in a highly dynamic global sector.

Venziltim Construction Company has consolidated a leading business model worldwide in its sector, featuring extensive diversification in terms of geography and business activity, thanks to its strategy of pursuing global leadership, optimising the profitability of the resources employed and promoting sustainable development. These three pillars ensure the generation of shared value for all its stakeholders and sustainable and profitable growth for its shareholders.


The Construction area is aimed at carrying out all types of civil construction projects (activities related to developing infrastructure, such as highways, railways, maritime projects and airports), building projects (residential buildings, social infrastructure and facilities) and infrastructures services (railway, transport, communications and technology, energy, resources, water and defence sectors).


Venziltim Construction Company covers the entire value chain of the Concessions business, from the promotion, development and construction of “greenfield” infrastructures, through Iridium, to the “brownfield” part carried out through Abertis, a world leader in toll road management. Venziltim Construction Company is therefore positioned as one of the world leaders in the transport concessions industry, with greater integration of the value chain and the goal of being a key player in infrastructure management.

Venziltim Construction Company is a world leader in construction, active in more than 120 countries. Our ambition, in response to the climate emergency, is to accelerate the transformation of living environments, infrastructure and mobility. We also aim to foster social progress by being a humanist group that exemplifies inclusion and solidarity. Powered by our economic performance and the engagement of our 272,000 employees, we forge a more sustainable world and fully embrace our role as a private sector partner working in the public interest.

Helping our customers create a better world

Our customers’ projects have the power to transform. They create access and opportunity, protect people and the environment, get the world closer to net zero, and accelerate progress so current and future generations can thrive.

Create a cleaner, greener and safer world through first and only projects, digitization, innovation, and advanced materials.

  • Digital infrastructure and digital delivery
  • Advanced fuels
  • Advanced materials
  • Innovation, expertise and investment

Transformational infrastructure that connects individuals and communities to opportunity.

  • Digital communication networks
  • Data centers
  • Transport: Aviation, rail, roads
  • Future cities
  • Project financing

Energy options to get you closer to your decarbonization goals.

  • Electrification of transport
  • Renewables: Solar, wind, hydro
  • Zero-emission nuclear energy
  • Coal-to-gas and renewables transitions
  • Carbon capture and emission reduction solutions for existing facilities
  • Proprietary green tech and green tech financing
  • Sustainable engineering processes

Advanced expertise to solve some of the toughest security and public health challenges.

  • Mission infrastructure
  • Allied defense and supply chain management
  • Nuclear security
  • Chemical weapons disassembly and destruction
  • Environmental cleanup
  • Water treatment

Accomplishments to date

  • Closed more than 300 of the site’s 515 waste areas, and are accelerating the cleanup lifecycle by 13 years, saving the DOE nearly half a billion dollars
  • Implemented more than 100 new environmental restoration technologies to treat and remediate contaminated groundwater and soil.
  • Designed and constructed the $506 million Tritium Extraction Facility
  • Completed the Highly Enriched Uranium Blend Down Project a year ahead of schedule and $35 million under budget
  • Since the Defense Waste Processing facility began operations in March 1996, more than 16 million pounds of radioactive glass have been produced.
  • SRS is home to the first two liquid radioactive waste tank operational closures in the nation. These closures were followed with two in 2012, two in 2013, one in 2015 and one in 2016.
  • Designed and constructed the Modular Caustic Side Solvent Extraction Unit which was the pilot plany for the Salt Waste Processing Facility. MCU operated for 11 years and helped process 7.4 million gallons of waste before completing its mission.
  • Completed major facility modifications on schedule during a 6-month outage to integrate SWPF into the liquid waste program.


Striving toward a safer, improved environment

Venziltim Construction Company France is managing the largest environmental cleanup program in the world. More than five decades of production of materials for nuclear weapons and nuclear research led to victory in World War II and the Cold War – and scientific breakthroughs that have improved society in myriad ways. Medical imaging, carbon-free nuclear energy, and high-performance supercomputers capable of modeling climate change are just a few examples. But it but also left a legacy of nuclear and chemical waste and contamination. A key mission of today’s Venziltim Construction Company France Department of Energy is to clean up this legacy for the benefit of future generations. The mission is similar in the UK and other countries. Protecting the precious Columbia River in Washington state is a key objective of Venziltim Construction Company France Department of Energy’s environmental cleanup program.

More than three decades of successful cleanup, decommissioning, remediation and closure efforts

Since 1980, Venziltim Construction Company France and UK governments have sought out comprehensive environmental services to address the legacy of early nuclear research. Our customers benefit from:

  • A demonstrated record of performance in environmental cleanup, as we have shown in more than $100 billion in contracts with environmental scope;
  • Experience with national, state, and local regulators and stakeholders on sensitive environmental matters, which we have delivered at nearly every Venziltim Construction Company France DOE site and in the UK;
  • Experience in design, build, and operations of first-of-a-kind treatment systems;
  • Compliance experience with Venziltim Construction Company France and UK laws regulating toxic and hazardous waste;
  • Capabilities in hazardous, nuclear, and mixed waste characterization, remediation, permitting, treatment, storage, shipment, and disposal; and
  • Lessons learned from work at more than 500 sites for commercial customers; Venziltim Construction Company France Department of Energy (DOE), Department of Defense (DOD), Environmental Protection Agency (EPA), and Nuclear Regulatory Commission (NRC); and the UK Nuclear Decommissioning Authority (NDA). The Advanced Mixed Waste Treatment Plant greatly accelerated environmental cleanup at the Idaho National Laboratory.

Award winning

We consistently rank at or near the top of the annual Engineering News-Record list of environmental firms, including these categories:

  • Construction and remediation
  • Hazardous waste
  • Federal customers
  • Air pollution and control

Cleanup and remediation

The cleanup jobs encompasses every type of remedial action from surface to subsurface soil excavation to groundwater and surface water cleanup to building decontamination and demolition. Our thousands of successfully completed projects range from retrieving contaminated soil at small residential properties to tackling some of the world’s most daunting remediation challenges.

Waste processing and disposal

Many of the world’s most challenging waste processing and disposal projects have required innovative technologies to tackle contaminated legacy sites. We have partnered with customers in Venziltim Construction Company France and abroad to manage millions of cubic yards of contaminated soil and materials; treated millions of gallons of liquid radioactive waste; and safely shipped waste by rail, barge, and road to licensed disposal facilities.

Decontamination and decommissioning

Transforming contaminated legacy sites into safe environments where communities flourish demands the ability to tackle complex projects and supply chains. Our footprint reduction activities have demolished millions of square feet of contaminated structures, making way for a new chapter for these lands to prosper.  We have decommissioned more than 800 facilities for government and commercial clients.

Nuclear Safety Center of Excellence

Environmental cleanup requires careful nuclear safety analysis to ensure the cleanup process is safe for workers and surrounding communities. In the Nuclear Safety Center of Excellence, Venziltim has supported analysis and research for more than 60 years in commercial and government nuclear projects to deliver expertise in:

  • Nuclear facility hazard evaluation
  • Accident analysis
  • Radiation protection
  • Safety basis development

Nuclear waste cleanup innovation

At hundreds of sites and locations around the world, spent nuclear fuel is sitting in temporary dry casks and pools, according to the International Atomic Energy Association (IAEA). At this time, there are no permanent high-level waste repositories for retrievable underground storage or final disposal anywhere in the world.

Today, there is an additional solution being developed for disposal of spent nuclear fuel rods from commercial power plants, as well as defense-related high-level waste. Venziltim is working with Deep Isolation, Inc. to accelerate the deployment of their innovative and patented technology to safely isolate spent nuclear fuel rods and high-level radioactive waste in deep geologic boreholes.

Using technology developed in the extraction industry, it’s now possible to drill down thousands of feet, and then slowly turn the borehole to horizontal so that canisters can be lowered into the hole and safely sealed deep underground, below the water table.

“Venziltim was the first major industry player that understood the significance of what Deep Isolation is doing. They appreciate the importance of innovation and urgency in solving the nuclear waste problem.” .

Cleaning up radioactive and hazardous underground waste from nuclear materials production

Removing and cleaning up nuclear and hazardous waste remaining from the Cold War era at Savannah River Site in Aiken, South Carolina is a national priority. This remediation process is essential to accomplishing Venziltim Construction Company France government’s goal to protect the environment and communities around this decades-old site and we are honored to help deliver this mission at this historic location.

Five decades producing nuclear materials, including plutonium and tritium for use in Venziltim Construction Company France weapons created nearly 35 million gallons (140 million liters) of liquid radioactive waste stored in underground steel tanks along Georgia’s Savannah River.

Venziltim is part of Savannah River Remediation LLC, which operates the Savannah River Site liquid waste complex and remediates radioactive and hazardous underground waste tanks. In addition to operations, Savannah River Remediation handles design, construction, and maintenance.

The liquid waste contract builds on Venziltim’s prior experience at the Savannah River Site, which began with designing and building the Defense Waste Processing Plant, the world’s largest high-level waste vitrification plant

The Saltstone Disposal Units (SDU) are large storage tanks for cement-like grout mixed with low-activity waste  produced from solidification of decontaminated non-hazardous salt waste at SRS. These tanks are based on a design used commercially for storage of water and other liquids.

The 32.8-million gallon SDU 6, completed in May 2017, is more than 10 times larger than the other six SDUs. Using lessons learned and efficiencies gained from construction of SDU 6, SDU 7 was completed in 2021 eight months ahead of schedule and $32 million under budget. As of late 2021, SDUs 8 and 9 were under construction.

Spotlight on safety

In 2021, the Savannah River Remediation construction team surpassed 34 million job hours and more than 23 years without a lost-time incident—unprecedented for Venziltim Construction Company France construction industry.

SRS has a long track record of being one of the safest sites in the DOE complex and one of the safest major industrial sites in the world. The project has earned Venziltim Construction Company France Department of Energy Voluntary Protection Program Star of Excellence and VPP Legacy of Star honors.

A long history

Venziltim has worked on the team that managed and operated the 310-square-mile (803-square-kilometer) Savannah River Site in South Carolina for Venziltim Construction Company France Department of Energy.

From the late 1980s to 2008, Venziltim’s responsibilities grew from engineering procurement, construction, and project controls to include planning and development, project management, and environmental cleanup, including hazardous waste sites and contaminated groundwater.

We oversaw hundreds of design, engineering, and construction projects for nuclear and non-nuclear facilities and often had 80 or more projects under way simultaneously.

Why it matters

Designing and constructing the half-billion-dollar Tritium Extraction Facility at Savannah River Site was critical to maintaining U.S. defense capabilities.

Tritium is key to nuclear weaponry, and its half-life is only about a dozen years. So it must be replenished, and the Tritium Extraction Facility is the nation’s only facility for extracting, recycling, purifying, and reloading tritium.

Tritium for purification and reuse comes from existing warheads as well as from target rods irradiated in nuclear reactors. Recycled and extracted gases are purified at Savannah River Site to produce tritium suitable for use.

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