Kristel Shayne M. Sigua
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(632) 8894-0377 to 79; (632) 8894-4931 to 32; (632) 8552-1977;

Shayne’s practice areas include competition and antitrust, corporate services, disputes (litigation & arbitration), energy, finance, and labor.

While in law school, Shayne was a member of the Order of the Purple Feather, the official honor society of the University of the Philippines (UP) College of Law, and received a Dean’s Medal for Academic Excellence.  She also served as part of the Executive Committee of the UP Bar Operations Commission in 2018.  On the other hand, while in college, Shayne was a consistent University Scholar and graduated cum laude with a degree in Business Economics.


  • UP College of Law, Juris Doctor (Class of 2020, ranked 13th in graduating class; received Dean’s Medal for Academic Excellence)
  • UP School of Economics, Bachelor of Science in Business Economics (Class of 2016, cum laude)
  • Admitted to the Philippine Bar in 2022 (Excellent Passer)


Shayne has participated in several matters.  Her experience has included:

  • Conducting due diligence in preparation for asset or share acquisitions.
  • Assisting on energy, labor, competition, telecommunications and public utilities, and corporate advisory matters.
  • Drafting pleadings in criminal, civil, and labor litigation matters.
  • Assisting clients in proceedings before Philippine courts.
  • Assisting in loan and financing projects.
  • Advising clients who wish to do business in the Philippines.


  • Member, Integrated Bar of the Philippines (2022-present)
  • Member, UP Women Lawyers’ Circle, Inc. (2022-present)
  • Member, UP College of Law, Order of the Purple Feather (2016-present)


  • Recalibrating the Wall of Separation in Philippine Society: An Evaluation of the Separation of Church and State Doctrine in the Philippines, Supervised Legal Research, UP College of Law, 2020.