SEIU Local 509
 

Administrative Support Specialist

Based in Marlborough, MA

 

ABOUT SEIU LOCAL 509
SEIU Local 509 is a fast-growing, progressive union representing over 28,000 state workers, human service workers, higher education faculty and family child care providers in Massachusetts. This position is part of the Local’s admin department. In the current political environment, the union has a steadfast vision to increase participation and power among its rank-and-file membership.

SEIU Local 509 is part of the Service Employees International Union (SEIU), one of the largest and fastest-growing labor unions in the United States.

DUTIES AND RESPONSIBILITIES:

• Anchor contract expirations, strike and ratification notices with internal organizing team and appropriate contacts
• Edit, maintain, produce and distribute contracts with external organizing team and communications team
• Coordinate logistics for all offsite meeting including rooms, meals, travel and materials
• Interface with post office regarding various needs including P.O Box, postage machine and meter updates 
• Maintain phone system, copiers, stationery, and supply vendor and repair contacts
• Assist Director of Admin with computer, zoom, and phone ordering, tracking and distribution
• Prepare, maintain and track large event equipment: speakers, bullhorns, materials
• Maintain admin storage closet including translation equipment
• Mail and track MARC and organizing team letters
• Track and document credit card activities
• Provide reception coverage when applicable
• Other administrative duties as needed

SUPERVISION RECEIVED:

• This position is supervised by the Director of Administration

QUALIFICATIONS:

• Ability to be flexible and balance several projects simultaneously
• Proficiency in Microsoft  andGoogle Suite; Adobe Acrobat 
• Ability to communicate well and function across the sectors and departments of the union including staff, members, officers, vendors, and visitors
• Openness to learning new systems
• Attention to detail and grammar; Bilingual Spanish skills a plus

COMPENSATION, BENEFITS & LOCATION

• This is a full-time bargaining unit position based in Marlborough, MA with regular hours of Monday – Friday, 9am-5pm, and occasional evening/weekend assignments.
• As of 1/1/26, the salary range for this position is $76,777.28 - $87,522.68 depending on experience. Benefits include, at no cost to the employee: health insurance with FSA and HRA, dental insurance, short and long-term disability, a pension, an optional 401k, and generous paid time off.
• Must have a driver's license, vehicle registration, and/or intent to purchase a vehicle. Our main office is located in Marlborough, MA.
• SEIU Local 509 requires new employees to have a record of COVID-19 vaccination or a valid accommodation at the time of hire.

HOW TO APPLY
To apply to this position, please submit an updated résumé and a thoughtfully written cover letter to jobapplication@seiu509.org and indicate “Admin Support Specialist” in the subject line. The application deadline is April 8, 2026 at 5pm.

Candidates who advance should expect in-person interviews at our Marlborough, MA headquarters in April. The expected start date is as soon as possible.

We want to interview the best candidates for our organization. If you think you have the skills to fill the role and serve our mission, even if you don’t meet every qualification in the list, please consider applying. We review all applications thoroughly and are open to considering candidates from many different backgrounds.

If you would like to request accommodation during the interview process, please email HR@seiu509.org. Accommodation requests will be handled confidentially. Please do not send inquiries about the status of your application.

SEIU Local 509 is an equal opportunity employer and does not discriminate on the basis of sex, race, color, religion, sexual orientation, gender identity or expression, national origin, cultural heritage, ancestry, political belief, age, marital status, pregnancy, physical or mental disability or veteran status. SEIU Local 509 is compliant with the Americans with Disabilities Act and we are committed to making special accommodations for your interview or work as a member of our team.