Darwin Aritonang has also handled several highly publicized litigation cases including representing Tempo Magazine in the case of Tommy Winata (Indonesian business man) vs. Tempo Magazine; representing The New York Times Company in case of the New York Times Company vs. PT. Newmont Minahasa Raya; representing Time Inc. Asia cs. in the case of Time Inc. Asia cs. vs. H.M. Soeharto, wherein Darwin Aritonang represented 23 international and 2 local media companies together with the Indonesian Journalist Association (AJI) and the Press Board submitted a Brief of Amici Curiae in Support of Petition For Review (Ad Informandum Petition) in the Judicial Review filed by Time Inc. Asia; representing Tempo in the lawsuit of Sukanto Tanoto (Indonesian business man) vs. Tempo; representing Anand Krishna in the criminal case of Anand Krishna vs. Tara Pradipta Laksmi; representing Ir. Basuki TjahajaPurnama (Ahok) in the criminal case of Ir. Basuki Tjahaja Purnama (Ahok) vs. Habib Novel Chaidir Hasan.

Darwin Aritonang was a member of a Task Force in handling case of Indonesian Citizen/Indonesian Migrant Workers abroad in Endangered Death Penalty (Satuan Tugas Penanganan Kasus Warga Negara Indonesia/Tenaga Kerja Indonesia di Luar Negeri yang Terancam Hukuman Mati) pursuant to President Degree No. 8 Year 2012. As a member of Task Force, Darwin Aritonang has assisted the government of Indonesia to save Migrant Workers outside Indonesia from Dead Penalty in following countries : Jeddah, Riyadh (Saudi Arabia), Doha (Qatar), Dubai, Abu Dhabi (Uni Emirat Arab), Hongkong, Macau, Shanghai, Guangdong and Beijing (RRT), Kuala Lumpur, Penang, Kinabalu, Kuching (Malaysia) and Singapore.

Darwin Aritonang also has a license in Intellectual Property Rights and Patent Consultant including protection of copyright, trademark, patent, industrial design and layout designs of integrated circuits. 

Besides as an Advocate, an IPR attorney and a Patent Consultant, Darwin Aritonang is also a Receiver and an Administrator where he was involved as the Administrator of PT. Davomas Abadi, Tbk, PT. Lautan Emas Mulia, PT. Samwoo Indonesia, PT. Exist Assetindo, Koperasi Simpan Pinjam Multi Niaga dan Ir. H. Mubyl Handaling, and PT. Karya Bina Bersama and he is also as the Receiver of PT. Samwoo Indonesia, PT. Karya Bina Bersama, Ir. H. Mubyl Handaling.

In carrying out his profession as a Legal Attorney, an Advocate, an IPR Attorney, a Patent Consultant, a Receiver and an Administrator, Darwin Aritonang will always respect the trust and confidence entrusted by his clients and work with a high standard of professionalism in accordance with the Law and relevant Code of Ethics.

As a holder of professional licences such as an Advocate, an Intellectual Property Rights, a Patent Consultant, a Receiver and an Administrator, Darwin Aritonang still has time for professional organizations in which he is a Chairman of The Supervisory Committee in Indonesian Advocates Association (PERADI-RBA), Vice Chairman of Indonesian Bar Association Officium Nobile (AAI - ON),member of The Advisory Board of Indonesian Receivers and Administrator Association (AKPI), member of Indonesian Intellectual Property Attorneys Association (AKHKI), member of Asian Patent Attorneys Associaton (APAA) and also a member of International Trademark Association (INTA).