Marianne M.Chao

Of Counsel

Taipei + 886.2.7712.3212

For more than 25 years, Marianne Chao has assisted clients on a broad range of construction and infrastructure projects, energy projects, intellectual property, and commercial and multijurisdictional arbitration and litigation.

Marianne represented the Taiwan Construction Industry Association in obtaining a favorable ruling from the Taiwan Fair Trade Commission to defeat the no-delay-damage clause, a breakthrough development in construction contracts. She led and won the well-known Matra Transport cases to secure a NT$1.7 billion arbitral award and advised on construction projects such as Taipower, CPC Corporation Taiwan, Chunghwa Telecom, CKS Airport Link, Taipei MRT, Taipei 101, Taiwan High Speed Rail, Taichung MRT, and independent power plants.

Marianne recently represented several international power groups for contemplated acquisition of several offshore wind power projects in Taiwan. She represented an independent power plant in Taiwan to file administrative appeals and lawsuits to challenge the Taiwan Fair Trade Commission's decision to impose the highest fine ever in Taiwan for alleged participation in a cartel.

Marianne strategizes litigation and arbitration involving multiple jurisdictions. She is very experienced in handling local commercial disputes, such as disputes between shareholders, issues related to corporate governance, financial institution litigation, and general commercial disputes.

Marianne has been honored in many prominent international legal guides. She has served as an arbitrator in arbitrations conducted in accordance with the Taiwan Arbitration Act and the ICC Rules of Arbitration. She is a former executive director of the Taiwan Bar Association and president of the International Federation of Women Lawyers, Taiwan Branch.


  • Primax acquires 70 percent of speakers and digital audio equipment manufacturer TymphanyJones Day advised Primax Electronics Ltd. in its 70 percent acquisition of Tymphany HK Ltd., a speakers and digital audio equipment manufacturer.
  • International bank prevails in two lawsuits involving securitization projectJones Day successfully defended an international bank in two lawsuits filed by an institutional investor for the loss of US$110 million.
  • Client bids on railway project in TaiwanJones Day assisted a client in the bidding process of the Ping Chao Line project by the Railway Reconstruction Bureau of Taiwan.
  • China Petrochemical prevails in three leading patent infringement cases in TaiwanJones Day successfully represented China Petrochemical Development Corporation (CPDC), a leading publicly listed company in Taiwan, in its settlement with Celanese International Corporation (CIC) after five years of litigation related to three patent infringement lawsuits against CPDC.
  • International bank files arbitration against Taiwan FIDCJones Day represented an international bank in the filing of an arbitration action against Central Deposit Insurance Company (Taiwan equivalent of the FDIC) in connection with the bank’s acquisition of a local distressed bank.
  • Leading pager manufacturer settles lawsuit in FranceJones Day represented a leading pager manufacturer in the defense of a lawsuit filed by its competitor for allegations of unfair competition and copyright infringement.
  • International engineering company prevails in arbitration against subcontract for high profile defense projectJones Day successfully defended an international engineering and construction company in an arbitration claim for time and costs filed by its subcontractor and prevailed in the counterclaim with respect to a very high profile defense project constructed under cooperation of Taiwan and a foreign government.
  • Multinational bank prevails in lawsuit fighting for ownership of certain precious metalsJones Day represented a multinational bank in lawsuit to fight for the ownership of certain precious metals attached by another two banks.
  • International bank prevails in arbitration against Taiwan FIDCJones Day represented an international bank as co-counsel in an arbitration against Central Deposit Insurance Company (Taiwan equivalent of FIDC) with respect to a dispute arising from the client’s acquisition of a local distressed bank.
  • Firm volunteers staff Taipei's Legal Aid FoundationAttorneys at Jones Day Taipei volunteer at the Legal Aid Foundation in Taipei by reviewing the applications of individuals who require professional legal assistance but lack the means to pay litigation costs and legal fees.
  • Taipei Bar Association members participate in reviewing and amending the Taiwan Constitution and promoting judicial reform, human rights, environmental protection, consumer protection, and gender equalityMarianne Chao in the Taipei Office serves as a director for the Taipei Bar Association ("TBA"), an organization whose members devote considerable time and energy to democratic and social movements in Taiwan.
  • Matra prevails in high profile Taipei case defending significant arbitral award against DORTSJones Day successfully defended an arbitral award to French company S.A.S. Matra Transport (Matra) against challenges by the Taipei Municipal Government's Department of Rapid Transit System (DORTS) related to various public construction disputes.
  • Bilfinger Berger/Continental Engineering joint venture negotiates two civil works contracts and claims related to Taiwan High Speed Rail CorporationJones Day represented the Bilfinger Berger/Continental Engineering Corporation joint venture in the negotiation and signing of its two civil works contracts and advised on subsequent claims for extension of time, prolongation and loss, and expense against the Taiwan High Speed Rail Corporation.
  • Speaking Engagements

    • April 16, 2016
      (企業法務主管-金融班) :「模擬仲裁庭」課程, 中華民國仲裁協會/台北律師公會
    • November 20, 2015
      國際仲裁之仲裁地, 2015第十九屆全國科技法律研討會
    • October 29, 2015
      Guerilla Tactics Often Used in Taiwan, 5th Annual GAR Live Hong Kong conference
    • October 23, 2015
      一帶一路-台灣青年律師的機會或挑戰?, 2015兩岸四地青年律師論壇
    • July 7, 2015
      Enforcement of Arbitral Award in Taiwan, HKIAC seminar in Taiwan
    • 2013年5月8日
      2013 國際仲裁研討會