After five years of service at Modern Precast Concrete, employees receive a gift and get to be guests of honor at the precaster’s annual company meeting. At 10 years, they take home a stylish watch from the same meeting. When they hit the 15- and 20-year marks, the Ottsville, Pa.-based firm gets a little more personal, sometimes calling a spouse or family member to find out what’s on the employee’s wish list (A new golf club? A DVD player?).