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A union for security officers at T-Mobile Park

Forming a union for security officers at the stadium will ensure you have a say in your working conditions: that you can make improvements that are important to you at work.

Many of your co-workers have already affirmed their support for forming a union with SEIU 6. Are you ready to join together to fight for better working conditions?

Interested in learning more?

Let us help you get connected with an organizer to learn more. All information you share with us is kept 100% confidential.

Unions are about workers coming together to have a voice on the job. You set the priorities and improvements you want to see made at work, we help you make them happen. Together, we can raise the standards at your workplace and make what you like about your job even better.

Here’s what we are hearing your co-workers want to see improved:

Better Wages

It pays off to belong to a union. Your co-workers have told us they want to see increased financial recognition for their important work. As a union, we can negotiate for wage improvements together.

Flexible Schedules

You appreciate the flexible nature of your work. With a union, you can ensure what you like about your job's flexibility does not change while also influencing scheduling improvements you do want to see.

More perks

You like the perks that come with your job but you also want to see more of them. Forming a union will provide you a voice at work to negotiate for things like discounts in merchandise and game tickets.

What union security officers say...

Mariners are union members

Did you know many Mariners workers are unionized? From the players to the stadium food service employees. Some of your co-workers, who are already part of a union, include:

The Pen, T-Mobile Park Restaurant

Food Service Workers

Some food services workers at T-Mobile Park are members of Unite HERE! Local 8.

cleaning staff member

Cleaning Staff

A number of cleaning staff members at the Seattle Mariners stadium are members of SEIU 6.

Connect with SEIU 6

If you’re interested in learning more about forming a union, use the form below and a member of the SEIU 6 team will follow up with you. We treat inquiries in confidence. Your employer will never know you contacted us.

Interest Form

Frequently Asked Questions

Here are answers to questions workers often have about joining a union:

A union is an organized group of workers who unite to have a voice on the job and have a say in their working conditions. Being part of a union gives workers the right to negotiate for workplace improvements as a group with their employer, in the form of a union contract. Once a contract has been negotiated and democratically voted in by the membership, it is also a union’s role to enforce it. Unions empower workers, defend their rights and keep employers accountable.

Unions are democratic non-profit organizations with leaders elected by the membership every few years. They are governed by clear constitutions, bylaws and other rules that are accessible to and changeable by the membership at regularly held conventions or meetings.

Ultimately, unions begin with workers. There are millions of union members in the United States, who know that by standing together they can achieve greater things than on their own.

The Service Employees International Union Local 6 (SEIU 6) represents more than 7,000 security officers, janitors, airport passenger service workers and allied industries workers in Washington state. SEIU 6 is part of the largest union in the country, which represents over 2 million service workers in North America.

SEIU 6 already represents a number of workers at T-Mobile Park, as well as some other Allied Universal Security workers. This makes SEIU 6 the perfect union to build power with security workers at the stadium. You can learn more about SEIU 6 at seiu6.org


When you and your co-workers come together to form a union, you can protect and improve your wages, benefits and working conditions. Some of the benefits of forming a union include:

  • A voice at work: Unionized workers have a say about their working conditions and can negotiate improvements.
  • Enforceable contract: Union members have a legal contract that protects their wages, benefits and conditions at work.
  • Accountability: Workers in a union have access to formal procedures and resources to dispute unfair treatment.​
  • Collective power: There’s strength in numbers. Unions level the playing field, providing workers with an equal voice to management.

There is value in having a collective voice at work, and the data proves it. Studies have shown that workers in a union are more likely to benefit from:

  • higher wages (11.2% more than what nonunion workers make)
  • employer-provided health insurance (94% compared to 68%)
  • access to paid sick days (91% compared to 73%);
  • retirement benefits through private employers (82% to 48%); and
  • guaranteed pensions through private employers (54% to 8%).

The union advantage is even greater for people of color, women, immigrants, and others who have confronted workplace discrimination. A union contract provides an assurance that all workers will be treated fairly at work.

Securing what you have today into a legally binding contract ensures that what you like about your job stays that way even if there is a change of management and even ownership. Belonging to a union also creates a support network: Stewards, union representatives, negotiators and lawyers will be there to ensure your fair treatment at work, always.

Workers wanting to form a union have legal rights and protections under the National Labor Relations Act. Because Mariners’ management is signatory to a Labor Harmony Agreement, Mariners employees have the huge advantage of following a fair and simple process known as “card check” to become unionized. Through this process, a union is automatically approved after a majority of workers sign cards saying they want a union. Signing a card is easy and confidential, you can even do it online here. Whether you are ready to sign a card or not, we encourage you to get in touch to strategize and talk about next steps with a union organizer.

Absolutely. The National Labor Relations Act protects the rights of employees to form a union. It is ilegal to fire, threaten or discriminate against a worker for their support of a union. What is more, Mariners management has a relationship with a number of Seattle-area unions. They have committed to respect the legal right of their employees to unionize if they choose to do so.

There is no cost to join until you vote in your first collective agreement. Once you start benefiting from your new contract, your dues will be no more than a small percentage of your earnings. Due rates vary per job type – we encourage you to get in touch with us to find out more about your specific union dues rate. Since unions are non-profit organizations, you can be sure everything you invest in your union is spent back in union members. The voice at work, rights and benefits that come with unionization are well worth the small cost associated with joining!

Ready to commit?

Sign a union support card to confirm your support for forming a union. Or, get in touch to learn more about organizing a union. 

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