NPC Headliners: Mark Dimondstein, Donald Maston & Brian Renfroe

Mark Dimondstein is President of the American Postal Workers Union, which represents more than 200,000 employees of the U.S. Postal Service and approximately 1,500 employees in the private-sector mailing industry. He began his first three-year term in November 2013 and was re-elected on October 5, 2016 for another term starting in November 2016. 

Since taking office, Dimondstein has transformed the APWU into a fighting, activist organization. He helped establish A Grand Alliance to Save Our Public Postal Service, strengthened the unity among the four postal unions, helped forge the Campaign for Postal Banking, and led the successful fight against a privatization scheme involving the office-supply chain, Staples. In the union’s recent contract fight, he outlined a vision that emphasizes the unity between the demands of postal workers for a good contract and the demands of the American people for an expanded, vibrant, public Postal Service.

As the APWU’s top officer, he is responsible for all of the operations of the national union, as outlined in the Constitution and Bylaws. He oversees all the activities conducted by the officers and staff of every department, division, and committee defined by the APWU Constitution. The president is the editor of the union's bimonthly magazine, The American Postal Worker, and is the union’s spokesperson on all contractual and legislative matters of concern to the union. Along with the APWU’s other top officers, the president is elected by mail-ballot referendum of the membership every three years.

Brian Renfroe was elected president by mail balloting of NALC members in 2022. Renfroe is a second-generation letter carrier who began his career in 2004 in Hattiesburg, MS, where he joined NALC as a member of Hattiesburg Branch 938. Just two years later, Renfroe was elected vice president of Branch 938. He also served as shop steward until 2008, the year his branch elected him president.

“As the son of a letter carrier, I grew up learning about the issues letter carriers have faced over the years,” he said. “At a young age, I had a deep appreciation for the hard work and sacrifice of the men and women of our union and its positive impact on my father’s job and my family. I quickly got involved in my branch because I felt a responsibility to do all that I could to keep moving forward and improving the jobs and lives of letter carriers. I still feel that responsibility.”

According to the NALC Constitution, the president of the NALC is responsible for enforcing the union’s rules and granting dispensations when the good of the union requires it, overseeing collective bargaining and enforcement of agreements, presiding at biennial conventions and other meetings and assign duties to officers and staff.

Don Maston was re-elected President of the National Rural Letter Carriers’ Association at the 118th National Convention in Reno, Nevada on
August 30, 2024. Prior to being elected President, Don served on the National Board as a resident officer for 5 years as Vice President and as a non-resident officer for 10 years as an Executive Committeeman. Don brings an extensive labor relations background to the position of President with over three decades of experience as a steward, having served as a Local, Area, Assistant and State Steward in California.

Don also served on the California State Board as an Executive Committeeman for 3 years, Vice-President for two years, State President for two years, and served as California’s full time State Steward prior to being elected to the National Board in 2008.
Don served as a member of the National Legislative Committee, Steward Task Force One and on the National Resolutions Committee. Don is happily married to his lovely rural carrier wife Michelle and has two grown daughters, Samantha and Taylor.