The go-to firm for Corporate, Taxation, Negotiation, Visa and Immigration concerns.


Unit 1202 Tycoon Centre Bldg. Pearl Drive
Brgy., San Antonio Ortigas Center,
1611 Pasig City, Philippines


Phone : +632 86953262

MFBR lawyers and associates care!

In light of the constantly changing social and economic landscape in the world due to COVID-19, everyone at Mallari Fiel Brillante Ronquillo has taken steps to make good our steadfast commitment to serve our clients and our communities.

To this end, we designed a new business model incorporating the traditional “brick and mortar” and “virtual” law offices. This new model is to achieve the continuity of rendering our legal and business consultancy services to clients and friends, and the immediate implementation of our crisis management and business transformation activities.

Thus, we’re glad to announce that for every fortnight, half of our team will be physically present at our offices from Monday thru Friday, 8:00am to 3:00pm. Clients and our friends can reach us through our office phones and online platforms (website, emails, Facebook, LinkedIn, Zoom, etc.). And to ensure the health and safety of our staff, they have the option to be housed in the Firm’s private residence or shuttled back and forth using the company’s private vehicle. Safety protocols are also observed at our offices.

Finally, our team has prepared a series of materials around the impact of COVID-19 and related considerations. Please take time to view our sample articles and research published in our website. A complete listing and discussion of these articles are available in our newsletter to be distributed to our esteemed clients.

Should you have questions, please reach out to our Office Manager, Argie Macawile, at +632 86953395, +63977 8502357; or email our Managing Partner, Atty. Rob Mallari, at and


Jonthan R. De Guzman

Jonathan R. De Guzman


Tel: +632 8695-32-62


Atty. Jonathan R. de Guzman is an associate at The Law Firm of Mallari Fiel Brillante Ronquillo. He is engaged in the practice of litigation involving civil, real estate, criminal and labor laws, and intra-corporate disputes. He represents corporations and individuals before courts of law, and government agencies such as the Philippine Overseas Employment Administration, National Labor Relations Commission, Commission on Elections, and the Intellectual Property Office. He has assisted a corporate client before the Manila Economic and Cultural Office in Taiwan.

Jonathan has experience in settlement of estate proceedings and transfer of property; contract-drafting and contract review; preparation of pleadings, legal memorandum, and other legal documents.

Prior to passing the bar, Jonathan volunteered for the Child Justice League, Inc. a non-governmental organization and legal arm of the Department of Social Welfare and Development, which provides legal assistance to children and women that were victims of abuse.

He graduated from the Ateneo de Manila University with a degree of Bachelor of Arts, major in Political Science. He obtained his law degree from Lyceum of the Philippines University – Makati, College of Law in 2016, and was admitted to the Philippine Bar in 2018.

Jonathan is a gregarious person with an infectious laughter. He has a flair for technology and ready to provide ideas out of the box.

He is always available for private consultation. You may contact him through

As a rapidly growing, highly qualified group of lawyers, associates, accountants, consultants and paralegals we are dedicated to finding innovative and swift solutions to all our clients' concerns.