Madeleine Osterling

Madeleine Osterling is a partner at Osterling Abogados. She is a leading specialist in corporate and commercial law. She is an expert in tax law, mining law, environmental and natural resources law, telecommunications law and arbitration. Her practice includes legal advice on corporate and corporate matters, with a particular focus on the regulatory aspects of the securities market.

In the field of telecommunications, Madeleine specialises in the legal and regulatory aspects of obtaining licences and authorisations and the installation of infrastructure, as well as assisting in administrative proceedings before the competent authorities.

She also has recognised expertise in all areas of mining and environmental law, as well as in the administrative and taxation aspects of exploration projects and the operations of companies in the sector.

She is an arbitrator at the Arbitration Centre of the Lima Chamber of Commerce; she is also a regular speaker at seminars and conferences. Madeleine Osterling has developed her career at Telefónica as director of Legal Affairs and at our firm as a partner.

She speaks Spanish, English, French and Italian.



  • Lawyer from the Pontificia Universidad Católica del Perú.

  • Senior Executive MBA from the University of Piura.

  • Master in Government and Public Administration from the Ortega Marañón Foundation

    2019 – 2020
  • ESADE Management Training Programme

  • Wealth Management Program Instituto de Estudios Bursátiles

    2021 – current


  • Lima Bar Association.

  • Arbitrator of the Lima Chamber of Commerce.

  • Arbitrator of the Arbitration Centre of the Pontificia Universidad Católica.

  • Peruvian Institute of Tax Law - IPDT.


Playing tennis, cycling, and swimming are her favourite sports. She enjoys visiting art galleries, furniture exhibitions and IIWW museums.



Privacy policies

Through this privacy policy, ESTUDIO OSTERLING S.CIVIL DE R.L. (hereinafter, “Osterling Lawyers”), with registered address at Av. Santo Toribio 143, Floor 3, San Isidro, Lima, Peru, describes how it processes personal data obtained through its websites. The personal data subject to processing will be those considered as such in accordance with the provisions of Law No. 29733 and its Regulations (hereinafter “the Law”), and their processing will be carried out on:

  • Contact details of our clients or potential clients who wish to receive information about our services, our events, or who wish to subscribe to newsletters that we may offer.
  • Visitors to our websites.
  • Applicants for job positions or training opportunities.

Osterling Lawyers is the owner of one or more databases containing personal data obtained on our website and therefore acts as the Data Controller and guarantees the appropriate processing in accordance with the principles established in the Law, adopting adequate and sufficient information security measures. Your personal data, according to its purpose, may be included in the databases of “Clients”, “Applicants”, or “Web Users”.

The personal data requested in the contact form is necessary to attend to your inquiries or requests; without them, we will not be able to assist you. Your personal data will be stored indefinitely or until you request their cancellation through the exercise of your ARCO rights.

Personal data we collect

Through our website, we collect the following types of personal data:

  • Identifying data: Name, gender, position, organization, job responsibilities, telephone number, address, email address.
  • Sensitive data: In accordance with labor legislation requirements, we may request sensitive personal data necessary for job applications.
  • Device data: Internet Protocol (IP) address of the computer, unique device identifier (UDID), cookies, and other data linked to a device, as well as data about the use of our websites (Usage Data).


Purpose of Processing

The purposes for which we use personal data, and the legal bases for such processing, are as follows:

  • To respond to inquiries about our services and to address requests and other communications received from our clients and potential clients.
  • In the case of our clients, to execute operations related to the services and manage the contractual relationship so that we can fulfill our obligations.
  • For the correct, adequate, and safe operation of our websites, we use device data.
  • To comply with legal obligations according to the applicable regulatory framework, such as labor regulations, compliance, and other sectoral regulations.

We must inform you that, in order to fulfill the aforementioned purposes, Osterling Lawyers may entrust the processing of your personal data to third-party providers; likewise, we inform you that some of the providers that provide us with services involving the processing of your data are located abroad, which implies the cross-border flow of personal data. Our providers correspond to AWS-Amazon Web Services Inc., a subsidiary of Amazon Com Inc., Microsoft Corporation; Lemontech, and Dropbox, who provide us with cloud storage services and necessary management tools for the contractual relationship and provision of services, and whose servers are located in the United States.

For more information and to exercise your ARCO rights, you can send a communication to our address or email us at

This privacy policy may be updated regularly, which will be notified to our users through the contact means provided and through its publication on our website.