Following World War I, Ohio National prospered, developing a strong sales force and penetrating new territories. The company used its strong actuarial resources to broaden its product offerings. Although the basic insurance product, whole life, had not changed appreciably in 50 years, improved actuarial studies, and health and demographic information, enabled the company to develop new, innovative approaches and expand benefits.
The company also continued the personnel standards set by Albert Bettinger when he hired Troy Appleby. There was a determined effort to hire marketing experts and knowledgeable professionals. The company set up its own school to train company personnel. Troy Appleby, who had taught mathematics, took a personal interest in shaping the program so that it reflected the highest standards of professionalism.