Dr. Matthias Dühn, LL.M. (Georgetown), Attorney-at-Law / Foreign Registered Lawyer (Vietnam):


Dr. Dühn has been admitted as a German qualified lawyer in Germany since 2001, and as a foreign registered lawyer in Vietnam since May 2007. Since 2007, he has been focusing his legal practice in Vietnam on foreign investment in Vietnam, market access for foreigners in Vietnam and all related matters of Vietnamese investment-, commercial- and corporate law. He established Viet Diligence Legal in 2014 with the idea to combine local Vietnamese expertise with his international experience. Dr. Dühn is well-versed in all legal matters relating to foreign investment and market entry in Vietnam, the establishment of companies, branches and joint ventures in Vietnam and complex contract negotiations, especially in connection with corporate acquisitions (M&A) in Vietnam as well as employment-related settlements in Vietnam. His clients mainly include German-speaking medium-sized companies and – to a lesser extent – private individuals. Dr. Dühn’s experience specifically covers the sectors sales and distribution, manufacturing, construction and real estate as well as IT and business process outsourcing (BPO). Prior to establishing Viet Diligence Legal, Dr. Dühn has gained relevant industry experience as the regional Chief Compliance Officer Asia-Pacific at MAN Truck & Bus based in Bangkok / Thailand. Dr. Dühn studied law with a focus on business and competition law at the Friedrich-Schiller University Jena and completed his doctorate in 2003 at the University of Osnabrück. Dr. Dühn also holds an LL.M. in Securities and Financial Regulation from Georgetown University Law Center, Washington D.C.

You can reach him at: +84 (0)914 247 295 /

Ms. Mai Lan, Attorney-at-Law :


Ms. Lan holds a law degree from Hanoi University and a Master’s degree in Business Administration (MBA) from Coventry Business School, London. She has worked as a Vietnamese attorney since 2014 and co-founded Viet Diligence Legal in 2014, where she successfully advised on foreign investment and licensing. At Viet Diligence Legal, Ms. Mai mainly advises on foreign direct investment, start-ups and joint ventures in Vietnam. In addition, Ms. Lan has extensive experience in Vietnamese commercial and corporate law, customs and competition law in Vietnam as well as in all labour and immigration law issues in Vietnam. Ms. Lan has experience in the following industries: IT and outsourcing, retail, manufacturing and real estate. Finally, Ms. Lan has years of expertise in investigative matters in Vietnam, specifically the identification and verification of individuals, real estate and other assets.

You can reach her at: +84 (0) 379483357 /

Mr. Do Khac Hiep, Attorney-at-Law:

Mr. Hiep graduated in law from Hanoi Law University and has been accredited as a Vietnamese lawyer from the Hanoi Bar Association since 2010 as an active member. Prior to joining Viet Diligence Legal, Mr Hiep has worked as in-house counsel for a large pharmaceutical company, and therefore understands especially the needs of in-house lawyers who form part of Viet Diligence’s client base. In addition, Mr. Hiep has experience as a senior associate for a large local law firm. Mr. Hiep focusses his practice on the general Vietnamese civil and criminal law, including representation of Viet Diligence Client’s at Vietnamese authorities and courts.

You can reach him at : +84 (024) 73000094/

Ms. Le Hoang Cam Sa, Attorney-at-Law:

Ms. Sa received her Bachelor Degree in Law from Ho Chi Minh City University of Law in 2017 and has been admitted as a Vietnamese lawyer in 2019. At Viet Diligence Legal she supports with all matters relating to company establishments, M&A and joint ventures in Vietnam, and is also in charge of labour- and immigration law matters in Vietnam.

You can reach her at: +84 (0) 908 575 809 /

Ms. Quan Ai Nhu, Attorney-at-Law:

Ms. Nhu received her Bachelor Degree in Law from Ho Chi Minh City University of Law in 2014 and has been admitted as a Vietnamese lawyer in 2018. At Viet Diligence Legal she supports with all matters relating to corporate- and commercial law as well as all labour- and immigration law matters in Vietnam. Ms. Nhu also supports Viet Diligence with all matters relating to intellectual property law in Vietnam as well as labour and immigration law matters.

You can reach her at: +84 (0) 908 575 809 /

Ms. Dao Minh Phuong, Legal Assistant:

Phuong received her Bachelor Degree of Law from Hanoi Foreign Trade University in 2016, majoring in International trade Law. She is also attending the official lawyer training course at the Vietnam Judicial Academy. Phuong focuses on investment, cooperate and commercial law. At Viet Diligence Legal, Phuong assists in preparing official dossiers for the establishment of enterprises, joint ventures and other investments in Vietnam. Phuong is also experienced in labour law related matters such as applying for residence cards and work permits.

You can reach her at: +84 (024) 73000094 /