Silaban began his legal career as a specialist litigator, representing numerous clients in handling various dispute resolution matters, including arbitration proceedings, criminal and civil cases at different levels of courts in Indonesia, employment disputes in the Industrial Relations Court, as well as bankruptcy and suspension of debt payment obligations (PKPU). In addition, Silaban has extensive experience in infrastructure projects, including turnkey and construction contracts, profit-sharing agreements, contracts for the transfer of oil mining management rights, and service agreements.