A trust administrator is the person put in charge of trust administration. At the time when a trust is created, the settlor (the legal name given to the person who creates the trust) will name a third party successor trustee. That successor trustee becomes responsible for managing trust assets if the primary trustee (typically the settlor) becomes incapacitated. When the settlor (and primary trustee) passes away, the successor trustee takes over the management of trust assets and is put in charge of trust administration. This means that to determine who is in charge of trust administration in a particular case, you should review the trust document to determine who was named as the successor trustee.