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Siahaan Gea Attorneys at Law

Practice Leaders 2023 Participation Award by Hukumonline



Ranked #1 in Recognized Midsize Litigation Practices 2021 by Hukumonline



Thank You for your Trust and Support!


The Firm

We are partnering for progress,
committed to handcraft precise legal solution

Siahaan Gea Attorneys at Law is a law firm established by two
young advocates who are vested with high passion and full
dedication in resolving legal disputes faced by any individual,
companies (both national or multinational), state or regional
owned enterprises and state institutions.

Area of Practice

Our expertise in dispute resolution
spans a wide range of matters, from general civil-related matters,
criminal law to complex insolvency proceedings.


As experienced courtroom advocates, we are keen to represent you to ensure your rights and interests are well defended and vindicated when litigation is becoming an option. We act for plaintiffs/defendants across the entire range of civil actions at the District Court, High Court and Supreme Court levels. This includes disputes in the contractual, tort, employment, property, consumer-related, banking & finance, shipping & aviation, insolvency, class-action and corporate-related arenas.


Criminal defence has been the founding partners primary interests ever since they were on the law school. Whenever you are dealing with criminal-related matters, our partners are your “go-to” counsels who can render the required assistance to fight hard to ensure you get the best possible outcome. Johanes Gea, one of the founding partners, has been dedicated almost ten years of his legal career in defending innocent clients before police investigations up to court trials.


Along with the effort Government’s effort to level up the State’s rank in the World Bank’s EODB index whose one of indicators is a positive mark in resolving insolvencies, the interest in pursuing legal rights trough bankruptcy and suspension of payment (PKPU) has been escalated recently. With extensive experience in handling insolvency-related matters, our Firm will be passionate to assist you to go through insolvency process deeply, extends across all aspects of contentious insolvency work, including enforcing security, representing creditor in filing claim, assessing restructuring proposals and defending corporate restructuring and re-organisation. One of our founding partners, Jesconiah Siahaan, is also qualified to practice as administrator & receiver for bankruptcy.


Siahaan Gea employment team focuses on employment counselling and complex employment litigation for clients in any sectors and industries, both for contentious issues including dismissal related disputes and non-contentious sides including internal investigations involving regulatory breaches, fraud, misuse of company property, etc.


Arbitration is now the primary means of resolving disputes for the international business community. With long-standing expertise in this form of dispute resolution, we handle arbitrations of all sizes and we tailor our involvement to suit each individual case.


Our practice in aviation issue is focused on providing legal solutions to the entire aviation sector. We have extensive experience in supporting, advising and representing the aviation sector and its insurers with respect to aviation accidents, critical mass of airline clients such as claims related to ticketing, baggage and personal injury.

Our partner, Jesconiah Siahaan, will be your primary contact for this aviation-related disputes as he has been equipped with experience in representing air carriers in claims brought by passengers as well as co-authoring some international legal articles on liability in Indonesian aviation laws, including the Aviation Law Review.


We represent the full spectrum of those involved in the industry, including shipowners and charterers, P&I Clubs, banks, international agencies, shipyards, marine insurance underwriters, governments and brokers.

The partner of the firm, Johanes Gea, was a prominent counsel to the shipping practice group in his previous law firm, by which he has handled various shipping-related disputes.


We provide you with a full range of real property services, including assisting with purchase and sale agreements, leasing agreements, title searches and registrations, up to representation in a complex land-ownership dispute.


We also render legal service of representing your interest before state administrative court for dispute related to a license issued or action committed by state officials.

With the recent enactment of laws and Supreme Court regulation, dispute in state administrative court now also covers a fictive-positive claim (a claim to obtain a Court decision on granting the request or the common legal term is “Permohonan Fiktif Positif.”) as well as tort by state officials or “onrechtmatige overheidsdaad.” We are at your disposal for further legal assistance on this


We also serve this areas too



Jesconiah Siahaan, S.H., LL.M.

Managing Partner

Jesconiah Siahaan or Jesco as he is better known, is the co-founding as well as the managing partner of the firm. Prior to establishing Siahaan Gea, he experienced almost ten years of legal practice as a senior associate in dispute resolution practice group of a tier one as well as Indonesia’s largest law firm, Assegaf Hamzah & Partners member of Rajah & Tann Asia Network

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Johanes Gea, S.H.


Johanes Gea or you could also call him Jo, is the co-founding as well as the partner of the firm. Before establishing Siahaan Gea, he experienced almost ten years of legal practice as Public Defender at The Jakarta Legal Aid Institute subsequently as leading criminal lawyer in dispute resolution practice group of a premier as well as Indonesia`s largest law firm, Assegaf Hamzah & Partners member of Rajah & Tann Asia Network

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“A good lawyer is not [only] the man
who has an eye to every side and angle of contingency, and
qualifies all his qualifications, but [also] who throws himself on
your part so heartily, that he can get you out of a scrape.” –
Ralph Waldo Emerson