He was conscientious about following the doctor's orders.
He was a good friend to his comrades, a conscientious leader mindful of his men's needs; an upright family man with strong, bright, proud children … —Tom Clancy, Without Remorse, 1994
Because Puckett was a conscientious lieutenant … his men did not have to stint on their fire. He had made sure that every man was carrying a basic load of ammunition and then some to spare … —Neil Sheehan, A Bright Shining Lie, 1988
He was shifty about money matters, not conscientious about returning advances, fulfilling contracts, reading manuscripts. —Monroe K. Spears, American Ambitions, 1987