Antonio J. Sifre



Maritere Ysern


Maritere Ysern is an intellectual property and entertainment attorney at The Sifre Group where she combines her two passions: law and film production. Ms. Ysern has more than 10 years of varied production experience, having worked in commercials, corporate and music videos, short and feature films, and television series, including as writer and director. In 2015 she won an Emmy for Screenwriting for her work in the Telemundo television series Incógnita.

Ms. Ysern, for seven years (2009-2016), taught a course in Film Production at Notre Dame High School in Caguas, Puerto Rico. She has been a team mentor and guest lecturer at the annual short films festival “Ponte Los Cortos”, and is frequently invited to give filmmaking, production legal and copyright workshops.

Ms. Ysern holds a Juris Doctor from the University of Puerto Rico School of Law (2016) and a Bachelor of Arts in Audiovisual Communications with a Certificate in Film Studies from the University of Puerto Rico (2008).

Isaura Pérez, CPA


Isaura Pérez, a Certified Public Accountant, has over 15 years of experience providing tax advisory services to clients in the United States and Puerto Rico. She specializes in strategic tax planning for legal entities and individuals, negotiating and obtaining tax incentives government grants, buying and selling tax credits, elections for special tax treatment, and structuring mergers and acquisitions. Ms. Pérez has expertise in a wide range of industries including tourism, energy, manufacture, real estate, film, and private equity. Her focus is providing clients creative and tax efficient solutions resulting in significant tax savings.


Ms. Pérez started her career at the “Big Four” international accounting firm Deloitte and continued her career at BDO Puerto Rico, where she led as Director of the Tax Advisory Services Department.


Ms. Pérez is a graduate of the University of Puerto Rico with a Bachelor in Business Administration.

Dorimar Bertrán, CPA


Dorimar Bertrán Peñagarícano is a Certified Public Accountant with over seven years of experience providing tax advisory services to local and international clients. She has focused her career in helping clients apply, negotiate, and obtain tax exemption grants and tax credits under Puerto Rico tax incentives laws.


Ms. Bertrán has provided services to clients in various industries, such as tourism, energy, manufacturing, real estate, non-profit and retail.  She started her career at BDO Puerto Rico where she worked her way from staff to manager. 


Ms. Bertrán graduated from the University of Puerto Rico, Mayagüez Campus, with a Bachelor of Science in Business Administration (2010).

Claudia S. Picó


Claudia Picó is the Executive Assistant and Marketing Coordinator at The Sifre Group. Ms. Picó oversees project workflow, and performs research and paralegal work, including the preparation of contracts, tax credit transfer documents, and the coordination of closings.


Ms. Picó has been actively involved in the music industry for more than six years, working closely with executives from various companies in the industry, including Sony Music Entertainment Puerto Rico, ASCAP, and The Recording Academy.


Following her passion for both marketing and music, Ms. Picó spent time in New York City working at Superfly, a creative company that curates culture through experiences, where she immersed in the production and programming of live music events and helped create award winning campaigns for some of the most recognized brands in the world, including Adobe, Citi, and Bose.


Ms. Picó holds a Master of Music in Music Business and Entertainment Industries from the University of Miami (2017) and a Bachelor of Business in Marketing and a Certificate in Business Communications from the University of Puerto Rico (2014).

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