Why Weldon?

Weldon is the ideal partner to provide support services for any company, whether cleaning, administrative services, access control or school monitors. In this way, we can help the client to focus on the core business of their company.

icon-¿Por qué Weldon?


We are present throughout Spain, including the islands, with over 30 branches. Internationally, we can be found in Portugal. The result: being close to you, working with maximum agility and establishing a relationship of trust between the client and Weldon.


Our dedication to our clients allows us to work ad-hoc for them, providing greater flexibility in business processes and better productivity in results. We are effective.

We also act with agility and flexibility when it comes to covering services, we are constantly recruiting, hiring and training personnel.

In addition, we have our own work protocols, with methods designed for agile and efficient interventions.


Weldon is ISO 9001 quality certified by AENOR, which guarantees excellence in all the processes of the services provided and in selecting the best candidate.


Weldon has a wide national coverage, with more than 30 branches, as well as international coverage with offices in Portugal, in order to provide a fast, close and swift response to our clients. The delegations are specialised in providing our clients with those facilities services that best suit their business.


Quality assurance

Weldon’s work processes maintain the highest quality standards and are ISO9001 certified.

We care for the environment

The services provided by Weldon have a low potential impact on the environment.

We are fully committed to reducing the use of chemicals, single-use plastic products and paper consumption. All of our services make use of environmentally friendly materials. Most of the cellulose products we have are Ecolabel, certified, whether they are 100% recycled paper or 100% pulp.

Special Employment Centre

In order to promote inclusion of people with disabilities in the world of work and to help companies comply with the General Disability Law (LGD), Staff Hotel has the support of Grupo Constant’s Special Employment Centre registered in the autonomous community of Catalonia.

Health and safety

The company supplies its products and services with the highest standards of quality and safety, both for customers and for its own employees.

National and international presence

Discover our interactive map!

Constant Group Central Delegations

Barcelona: Avinguda Diagonal, 523, Edificio Atalaya, Planta 21

Madrid: C/ Alfonso Gómez, 42C / C.P 28037

Lisboa: Rua Manuel de Jesus Coelho, nº4, 4º Andar, 1150-220

National Delegations

Alicante / Barcelona / Ibiza / Las Palmas / Madrid

Málaga / Murcia / Palma de Mallorca / Sevilla

Tarragona / Tenerife / Valencia / Zaragoza





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