Competitive Service versus Excepted Service Positions. There are two types of non-executive positions in the federal government: 1) those that are in the competitive service, and 2) those that are in the excepted service. Competitive Service â Competitive service positions are subject to the civil service laws passed by Congress.
Post to Facebook. Kevlar inventor Stephanie Kwolek dies at 90 Stephanie Kwolek, the DuPont scientist whose invention, Kevlar, has saved countless lives as the essential ingredient in body armor, has died. Kwolek, of the Sharpley neighborhood in Talleyville, died Wednesday following a brief illness, said her friend, Rita Vasta, who is handling Kwolek's affairs. She was 90.
Poly-paraphenylene terephthalamide â branded Kevlar â was invented by Polish-American chemist Stephanie Kwolek while working for DuPont, in anticipation of a gasoline shortage. In 1964, her group began searching for a new lightweight strong fiber to use for light but strong tires.