The collapse of Australian radio's most lucrative partnership is now a landmark test case for HR practitioners — and a warning about how workplace safety complaints can trigger far-reaching legal consequences
When Jackie Henderson sent a formal complaint letter to her employer earlier this month stating she could no longer work alongside co-host Kyle Sandilands, she was doing something HR professionals counsel employees to do every day: putting her concerns in writing and exercising her workplace rights.
What followed has since become one of the most closely watched employment law disputes in Australian broadcasting history — and a case study that is already circulating among human resources and workplace relations practitioners for what it reveals about the risks of terminating an employee shortly after they raise a formal grievance.
Henderson has filed proceedings in the Federal Court against Commonwealth Broadcasting Corporation Pty Ltd, the ARN Media subsidiary that holds the licence for Sydney's KIIS 1065, seeking compensation of at least $82.25 million. The claim centres on alleged contraventions of section 340 of the Fair Work Act 2009, which prohibits an employer from taking adverse action against an employee because they have exercised, or proposed to exercise, a workplace right.
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The timing is the critical detail. Henderson's complaint letter — which raised psychosocial health and safety concerns and alleged bullying in relation to Sandilands' conduct on and before February 20 — preceded the termination of her contract. Her legal team is arguing the two events are not coincidental.
ARN disputes the claim and has indicated it will defend the proceedings vigorously.
A case built on psychosocial risk
For HR leaders, the nature of Henderson's complaint is as significant as the dollar figure attached to it. Her letter did not simply raise a personality conflict. It invoked the language of psychosocial health and safety — a domain that has received sharply increased regulatory attention across Australian jurisdictions in recent years, with model Work Health and Safety laws now explicitly requiring employers to manage psychosocial hazards in the same manner as physical ones.
Bullying, as alleged in Henderson's complaint, sits squarely within the psychosocial hazard framework. Employers who receive such a complaint are required to take it seriously, investigate appropriately, and — critically — ensure that the person who raised it is not disadvantaged as a result.
Whether ARN did so will be for the Federal Court to determine. But the threshold question the case raises is one every HR director should be asking internally: if a high-performing employee raises a formal psychosocial safety complaint today, and their employment ends within weeks, how defensible is that sequence of events?
Adverse action: a refresher
Section 340 of the Fair Work Act is among the most powerful — and most litigated — provisions available to Australian workers. It prohibits adverse action taken because an employee has exercised a workplace right, which includes making a complaint or inquiry in relation to their employment.
Critically, the burden of proof in adverse action claims is reversed. Once an employee establishes that adverse action was taken and that they had exercised a workplace right, the onus shifts to the employer to prove the action was not taken for a prohibited reason. This reverse onus makes adverse action claims particularly difficult to defend when the timeline between a complaint and a termination is compressed.
Read next: Employer sacks manager after pay complaint — court finds Fair Work breach
Henderson's proceedings also include a separate allegation that ARN's ASX market announcement of March 3 contained misleading and deceptive statements under the Australian Consumer Law — a dimension that broadens the legal exposure considerably and underscores the importance of carefully worded corporate communications when employment disputes are live.
The Sandilands dimension
Henderson's case does not exist in isolation. Sandilands, whose $100 million contract was terminated following the February 20 on-air incident, has separately commenced wrongful termination proceedings against ARN, appearing in the Federal Court in Sydney last week. He continues to deny allegations of misconduct.
ARN now faces simultaneous legal challenges from both former co-hosts — a situation that illustrates how quickly a single workplace incident can escalate into compounding legal and reputational exposure when grievance and termination processes are not managed with precision.
For employers navigating similar situations — where a complaint is made about one employee by another, and decisions about both must be made in close succession — the ARN case is a timely reminder that the order, documentation, and rationale behind each decision will face intense scrutiny.
What HR practitioners should take away
Employment lawyers and HR advisers are likely to be watching the Henderson proceedings closely, particularly the adverse action dimension and the psychosocial safety framing. Several immediate lessons are already apparent.
First, the receipt of a formal psychosocial complaint from an employee should trigger a documented, structured response — not an accelerated review of that employee's contractual position. Second, any decision to terminate employment in the weeks following a formal grievance requires watertight documentation of the independent reasons for that decision. Third, public statements made during an active dispute — including regulatory disclosures — carry their own legal risk and should be reviewed by both legal and HR leadership before release.
The Henderson case has some distance to run. But as a real-time illustration of how workplace rights, psychosocial safety obligations, and adverse action provisions intersect, it has already earned a place in the induction materials of Australian employment law practitioners everywhere.
