When the employees of a large maintenance and building repair company tried to organize a union, the company fired several of the most active organizers, began holding one-on-one meetings to interrogate employees about their intentions, and sent each employee a letter with veiled threats about what would happen if they joined the union. This employer is utilizing:

Union suppression tactics.

Explanation:

Union suppression tactics are used to avoid union from taking steps that cause productivity of organization or taking steps against the management. It is illegal to supress the union from organizing any protest or asking any question to manegement.

Employer take different steps to supress union are plant closings, refusing to hire pro-union applicants, firing or harassing union supporters and suing permanent strike replacements

Employer should avoid following steps to negotiate union smoothly instead:

Employer should have regular communication with employee to avoid union at workplace.