Complex sentence: He earned his BA from The College of Wooster, his medical degree from Tufts University in 1969, followed by six years service in the U.S. Public Health Service (USPHS) where he helped develop one of the earliest computerized health risk appraisal instruments (HRA).
Split into simpler sentences: He earned his BA from The College of Wooster, followed by a medical degree from Tufts University in 1969. He then spent six years in the U.S. Public Health Service (USPHS) where he helped develop one of the first computerized health risk appraisal instruments (HRA).