A union organizer is a specific type of trade union member (often elected) or an appointed union official. The organizer's role is to recruit groups of workers under the organizing model, may enforce work rules and also take on legal roles to represent the workers. Organizers also assist non-union workers in forming chapters of locals, usually by leading them in their efforts.
Being a union organizer can often be a hazardous job, especially in the global south, but it is by no means easy in industrialized countries either. Historically, unionization required immense personal sacrifices and struggle from the ones starting the organizing, but over the years, unions were somewhat integrated in the Western system, especially after World War 2.
The union organizers in Wikispooks tend to be "the somewhat integrated in the system", as many of them attended the Bilderberg conferences as representatives of anti-communist unions or as state bureaucrats. Some have connections to the CIA or other intelligence services.
Apart from official harassment and arrests, where the police and judiciary takes side with the employers, organizers are often found "dead in a ditch". There are company's that offer specialized services aimed at preventing the formation of unions. The mafia has infiltrated unions in the US for decades.