- Pontificia Universidad Católica del Perú, 1985.
- Hernández & Cía Abogados Law Firm (1992 to present).
- Participated in different investigation groups directed by the Peruvian Institute of Tax Law (IPDT), the Fiscal Association (IFA) – Peruvian Group, the International Tax and Human Rights Association, and the Latin American Institute of Tax Law (ILADT).
- Former professor of tax law at Universidad del Pacífico
- Chambers and Partners and Latin Lawyer, have recognized Milagros Bustillos annually as a recommended specialist in tax matters.
- In its 2008, 2009, and 2011 editions, International Tax Review named Hernández & Cía. Abogados Peru Tax Firm of the Year, as part of its acknowledgment of the world’s best tax firms.
- Lima Bar Association.
- Active member of the Peruvian Institute of Tax Law (IPDT).
- President of the Peruvian Institute of Tax Law (2013-2015) (IPDT).
- Active member of the International Fiscal Association (IFA) – Peruvian Group.
- Member of the Board of Directors of the Latin American Institute of Tax Law (2008-2010) (ILADT).
-Spanish and English.