- Seacare Cooperative Limited
 - Trade union and cooperative society. Aims to help and benefit Singapore seaman and their families through more work opportunities and appropriate investment projects. - Singapore Airlines Staff Union (SIASU)
- Aims to improve working conditions, raise the productiviy, and industrial relations between members and employers.
- Singapore Manual & Mercantile Workers' Union
- Safeguard the interests of workers and promote good and harmonious industrial relations between management and employees.
- Singapore Maritime Officers' Union
- Primarily looks after members' employment and working conditions through the terms and conditions of collective bargaining agreements negotiated on behalf of the members.
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