Philippe Cottier was born in 1963. He graduated from University of Geneva School of Law in 1987.

After a stay in Brazil he began his professional career as a trainee with the law firm Canonica, Clostre & Associés in Geneva and was admitted to the bar in February 1991. He then worked as an associate with the law firm José Mario Armero in Madrid (which merged with Uria y Menendez in 1999) and went on to work in London with Ashurst. In 1994 he joined Lachenal Brechbuhl Cottier Roguet, which became Pestalozzi in 2001. Philippe Cottier became a Partner on January 1, 1998. In 2009, he founded together with Daniel Udry the law firm 100 Rue du Rhône Avocats.

His practice areas are real estate, international estate planning, national and international tax law, commercial law, economic administrative law. He is an experienced litigator.

Philippe Cottier speaks fluent French, English and Spanish and has a good command of Portuguese.