The clash dates back to March, when a former Atlassian engineer who left in June 2023 lodged a case alleging she was dismissed after repeatedly criticising company leadership on internal Slack channels. Atlassian responded with a strongly worded defence in the US case, arguing she crossed an unacceptable line by targeting the chief executive of the Sydney-headquartered software group.
In July, the US National Labor Relations Board found the company breached labour laws by firing her. Regulators ordered Atlassian to reinstate the engineer and provide back pay.
Atlassian is now appealing the ruling and attacks the decision on procedural and legal grounds, saying the original termination finding is flawed at every stage of analysis. The company argues that at least one Slack message at the centre of the case should not be treated as legally protected activity under US labour rules.
Atlassian frames the posts as conduct that justified disciplinary action, not protected workplace speech. That distinction sits at the core of the company’s pushback.
The case highlights a growing friction between employee speech on internal collaboration tools and corporate efforts to police criticism, especially at high-profile technology brands. US labour regulators are increasingly willing to treat digital workplace conversations, including Slack threads, as protected activity in disputes over unfair dismissal.
Atlassian’s challenge is shaping up as an important test of how far that protection stretches when criticism zeroes in on top executives.
