Orpha has been a missionary of NTMPI for more than 2 decades. Her first field assignment was among the Butbut tribe in 2001 where she served together with late husband, Johnny Macad, a Butbut native himself. They spent more than 9 fruitful years in the area before moving to Daguioman, Abra to serve among the Banao Tribe in 2011.

It was in 2015 when the Lord called them to Dinalupihan, Bataan to serve as staff and faculty at New Tribes School of Missions. Her husband unexpectedly went to be with the Lord in November 2020. That however, did not stop Orpha from pursuing God’s call. She went back to the Butbut tribe together with her grown-up children, Phoebe and Ian. She currently assists church workers among the Butbut tribe and disciples the youth and women with the help of her children.