Dora Carrington, chief of the Administrative Services Group at the Department of Labor, has been named one of the top 10 businesswomen of the year by the American Business Women's Association.

Carrington, who began her career with the Department of Labor as a clerk typist 25 years ago, said, "Women entering the business world today should be aggressive enough to ask for what they want. They must realize that everyone cannot start at the top, but with a lot of hard work, confidence in self and ability to succeed, they can achieve their goals."

Winning out over 2,100 other ABWA members, Carrington was placed among the top 10 for her advancement in business, involvement in community relations and contributions to ABWA. TRADE

Paul Rettig, staff director of the subcommittee on health of the House Ways and Means Committee, will take over as vice president for health-care policy at the Health Industry Manufacturers Association, beginning Jan. 1. Rettig began his career in 1959 with the Social Security Administration, where he helped develop legislative and administrative policy for the Medicare program. Fourteen years and several positions later, he was asked to fill the senior professional associate position at the Institute of Medicine of the National Academy of Sciences. He joined the Ways and Means staff in 1974. At HIMA, Rettig will serve as the principal representative to the health-care policy community.

The Society of the Plastics Industry has hired a vice president of finance and administration. Peter Ross Agnew, controller for the Chemical Manufacturers Association for the past five years, has taken over the Plastics Society's accounting, personnel, office management and general administration.

Robert Ragland, who began his career at the National Association of Manufacturers six years ago, has been promoted to assistant vice president of taxation for the 13,000-member group. Ragland worked as an associate director of regulatory reform and government analysis with NAM before leaving in 1982 to work as a congressional affairs manager for Clorox Corp. in Oakland, Calif. He returned to NAM this past fall to accept his new position.