Mr. Peralta is a Senior Partner of Calleja Peralta Jimenez Law Office and Head of its Corporate Practice Group with particular emphasis on Technology, Media and Telecommunications (TMT). He is also Corporate Secretary of Technikos Corporation, NextStage, Inc., Pulse Asia Research, Inc., Pulse Asia Research, Inc., ML Identification Technologies, Inc. and the Jose W. Diokno Foundation, Inc. He served as President of the Licensing Executives Society of the Philippines (2015-2017). He is a Director of Accor Advantage Plus Philippines, Inc., Just Kitchen Philippines, Inc., Country Representative of Dermalog Information Systems GmbH and Managing Director of ML Identification Technologies, Inc.

Mr. Peralta has assisted clients in the structuring of agreements for technology, intellectual property, and privacy cases. He has represented companies in negotiating and drafting software, hardware, internet, and other information technology transactions. He has negotiated and drafted outsourcing, external service provider agreements, web-based services, and online subscriber agreements, including business process outsourcing agreements. He has successfully handled government procurement projects for foreign clients with the Commission on Elections, Land Transportation Office and the Bureau of Immigration.

His practice focuses on transactional, regulatory, and licensing issues and related legal matters necessitated by convergence in the TMT field, assisting clients in achieving their business objectives while complying with relevant laws and industry standards.

He has been practicing intellectual property law since 1987. He is a member of IPAP, LESP, APAA, ITECHLAW, INTA, IPRO, and IPAA. He handles intellectual property litigation and arbitration on a range of technologies.
Mr. Peralta has extensive experience in Mergers & Acquisitions. He handled the acquisition by the leading consumer paper corporation of the local operations of its rival company and the due diligence in relation to the possible acquisition by the same company of another takeover target. Mr. Peralta also handled the initial public offerings for the leading electrical distribution company, the leading broadcasting company and two real estate development companies as well as the international offering of the leading gold mining company. He has handled and incorporated several joint ventures between foreign and domestic corporations engaged in power generation, fast-food/restaurant services, wholesale retailing, manufacturing, information technology and transport vehicle production.

He has appeared in various cases involving intra-corporate disputes, insolvency, corporate rehabilitation, disputed tax assessments, unfair competition, trademark, and patent infringement. He previously argued before the Supreme Court in a case involving the foreign ownership issue involving the Philippine Long Distance Telephone Company. was counsel for the petitioner in the landmark case of Corporation Law.

Mr. Peralta teaches Corporation Law, Credit Transactions, Cyber Law, Intellectual Property Law, Land Titles & Deeds and Mergers & Acquisitions at the De La Salle University College of Law. He is the Associate Dean of DLSU College of Law. On January 7, 2014, he was awarded the Ricardo J. Romulo Professorial Chair for Commercial Law. He was accorded an Honorary Membership by the Association of Fellows and Legal Scholars of the Center for International Studies based in Vienna, Austria in 2001. He was an ASEAN Overseas Training Scholar having attended the Intellectual Property Rights-Management Training Program in Tokyo, Japan in February 2002, sponsored by the Japan Patent Office.

He was the author of the Philippine section of International Telecommunications Law, Global published by BNA in London, U.K. He is also a co-author of the Philippine section of Global Privacy and Security Law published by Aspen Publishers/Wolters Kluwer. Since 2005, Atty. Peralta has been consistently cited by the Asia-Pacific Legal 500 and Asia Law Profiles for his work in Corporate Law, M&A, and Intellectual Property. Since 2018, he has been recognized by Asia IP and Who’s Who Legal as a Leading Lawyer in Technology Law.

In 2023, he has received accolades from ASIA IP as an IP Expert in Information Technology and Telecommunications (asiaiplaw.com), WHO’S WHO LEGAL as a Global Leader in Data-Information Technology (whoswholegal.com)