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Nilanjan Sen

New Delhi, India
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Seven Seas Partners LL.P.
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An experienced lawyer with a long history in the profession spanning over three generations of legal professionals. He practices litigation in multiple jurisdictions including Calcutta High Court, Delhi High Court, Supreme Court of India as well as other Tribunals. Nilanjan is an expert in Commercial Litigation and Arbitrations. He completed his LL.M. from the prestigious Leiden Law School in the Netherlands specializing in Investment Treaty Arbitrations and International Commercial Arbitrations and additionally also has expertise in Dutch and European commercial laws. 

He has experience handling multiple institutional as well as individual cases in diverse branches of law such as corporate law, consumer, civil, criminal law, environmental and constitutional law. He has also handled multiple arbitration matters including setting aside proceedings of both international as well as domestic arbitral awards as contemplated within the framework of the Indian Arbitration & Conciliation Act of 1996. He regularly advises clients on commercial contracts ranging from formation to insolvency, pre-dispute settlement strategies as well as on the formation of trusts, securing business licenses from Governments, agreements relating to seed funding, employment for startups among other matters.

Nilanjan has represented and holds a clientele comprising of Fortune India 500 companies and leading Indian as well as International corporations including the Government of India. Over the course of his practice, he has had the honor of being appointed Special Officer by the Calcutta High Court (Court of Appeal) on multiple occasions, for purposes ranging from conducting seizure of premises to taking evidence upon administering oath by virtue of the Court having conferred upon him the powers of a territorial court of the first instance under India’s Civil Procedure Code of 1908. Along with his legal practice, he is an academician delivering lectures and holding workshops for students in leading Indian universities. 


International law

Private international law

Foreign Investment Protection

Technical Barriers to Trade

Public international law

Corporate (general)

Restructuring and insolvency

Employment / labour (general)



Construction (contentious)

Disputes / litigation (general)

Corporate and commercial (contentious)

Data protection and cybersecurity (contentious)

Debt recovery

Fraud and corporate crime (contentious)

Professional negligence


Insurance and reinsurance (contentious)

Real estate (contentious)


Leiden University - Master Law (Advanced) in International Disputes Settlement and Arbitration

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