Our Narrative Colin Brien is a lawyer who holds an LL.M. in Taxation and has more than 20 years of expertise in information reporting and withholding, developed during his time in Big Four public accounting. He offers advice to nonfinancial companies looking for clarity on intricate tax reporting regulations. Colin assists organizations in understanding and adhering to fundamental withholding and reporting obligations—areas that are frequently neglected—by delivering practical, targeted guidance customized to their specific operations.