About Us

The American Postal Workers Union (APWU) Health Plan is a National Preferred Provider Organization (PPO) that offers both a fee-for-service High Option plan and a Consumer Driven Option Health Plan. Both options are open to all employees or retirees covered under the Federal Employees Health Benefits (FEHB) Program. Located in Glen Burnie, Maryland, the Health Plan is a department of the American Postal Workers Union. At our office, we employ 200 persons, to service the 205,000 people who are covered by the Health Plan. The APWU Health Plan is a self-administered and self-underwritten plan, fully committed to providing quality health insurance to eligible members within the FEHB Program. For more information browse our website or call us at 1-800-222-APWU. To contact the Health Plan please click here to send an email.


Mark Dimondstein, President, American Postal Workers Union

Mark Dimondstein is President of the American Postal Workers Union, which represents 250,000 employees in the clerk, maintenance and motor vehicle crafts.

Prior taking office in November 2013, Dimondstein held a variety of positions in the APWU. He was elected to six consecutive terms as President of the Greater Greensboro Area Local, serving from 1986 to 1998. He also acted as a local shop steward, labor educator, National Arbitration Advocate, EEOC and OWCP representative, and leader of the Workers for One Postal Union movement.

Beginning in 2000, Dimondstein was appointed by APWU President Moe Biller and later by President William Burrus to serve as National Lead Field Organizer, a position he held for 10 years. As Lead Field Organizer, he engaged in a series of ground-breaking union organizing campaigns and contract negotiations for private-sector workers in the mailing industry. In tribute to his efforts, he received the AFL-CIO Southern Organizer of the Year Award in 2001, presented by then-president of the AFL-CIO, John Sweeney.

Dimondstein was appointed by the Greensboro City Council to serve on the Greensboro Human Relations Commission, a position he held for six years. In addition, he served as the coordinator of North Carolina Labor Against the War, co-founded the Greensboro Chapter of Jobs with Justice, and helped initiate a local coalition, Postal Customers and Workers United to Save the Public Postal Service.

Dimondstein began his postal career in 1983, and held bid positions of LSM operator and manual, automation and retail clerk. Prior to entering the Postal Service he worked as a printer.

Throughout his many years of activism, Dimondstein has held a fervent belief that the union belongs to the members, the American people deserve vibrant public postal services, and workers everywhere deserve dignity and respect.

He has been married to his union-activist wife, Melissa, for 38 years. They have three adult daughters and one grandchild.


William J. Kaczor Jr., Director, APWU Health Plan

William “Bill” Kaczor, Jr. has been the director of the Health Plan since June 1985.  Prior to becoming Director, Kaczor served as Assistant Director at the Health Plan, and was the Secretary-Treasurer of the former National Association of Post Office and General Services Maintenance Employees Union, AFL-CIO (NAPO & GSME), a position he held until the merger of five unions in July 1971.  From 1971 to 1980, Kaczor served on the APWU National Executive Board as well as the Health Plan Board of Directors.

In August 2010 Kaczor completed 40 years as an Elected Officer in the APWU and 48 continuous years as a full dues paying member of the Buffalo New York Local.

General Information:

American Postal Workers Union
Health Plan

799 Cromwell Park Drive
Suite K-Z
Glen Burnie, MD 21061
1-800-222-APWU (2798)
1-800-622-2511 (TDD)
8:30am - 7:00pm EST
Monday - Friday