From July, 1812 until the end of 1815 Señan held the office of Father-President of the California mission chain. Upon Father Payeras' retirement in 1820 he was reappointed and continued in office until he died.
Señan held the position of Father-President for the California mission chain from July 1812 to December 1815. Following Father Payeras' departure in 1820, Señan was again appointed and served until his demise.