A school in Southeast Asia lost four heads of department in a single academic year. The official explanation involved restructuring. What actually happened: the for-profit owner had begun overriding curriculum decisions mid-semester, and when critical reviews appeared on an international teacher platform, staff were called into the office one by one to be questioned about who had written them. Teachers who hadn't written anything started updating their CVs anyway.
This kind of leadership doesn't announce itself in the job posting. It doesn't show up in the interview, where administrators are practiced at warmth and vision statements. But there are ways to spot it before you sign, if you know what to look for and where.
What makes international schools structurally different from almost any other employer is a feature most teachers don't fully appreciate until they're already inside one: the rules that protect employees in most domestic contexts simply don't apply in the same way. You can't file a complaint with a labor board from overseas. Your right to remain in the country depends on your visa, which depends on your contract, which depends on the school renewing it. That asymmetry is exactly the condition under which toxic leadership thrives.
Why the Structure Creates the Problem
Over the past decade, international school ownership shifted significantly. Where traditional international schools were non-profit institutions governed by community boards, the majority today are privately owned and operated for profit [1]. ISC Research data puts 62% of international schools as individually or family-owned [2]. Corporate-owned chains have taken another substantial share.
The practical implication for teachers: you're often not working for a school with a board accountable to educators and parents. You're working for an owner, sometimes operating through a holding company in a different jurisdiction, who may have no educational background at all. And because replacing experienced international teachers mid-contract is genuinely difficult, owners and administrators know that contract-renewal pressure is a tool they hold and most teachers don't.
A 2025 survey of 471 school leaders across 103 countries by the Council of International Schools found that managing board governance and corporate ownership was among the top professional stressors they reported [3]. Leaders described board members unfamiliar with educational practice, owners interfering in staffing decisions, and governance structures where accountability ran in one direction only. That finding matters for teachers, not just heads. When a principal answers upward to a private owner with financial priorities rather than downward to staff and families, teacher welfare tends to be what gets traded away first.
What the Research Actually Shows
The study of toxic leadership in education is younger than you might expect. For a long time, educational leadership research focused almost entirely on what good leadership looks like. The darker side got left to corporate settings.
A 2026 systematic review by Muammer Maral examined 47 high-quality empirical studies on destructive leadership in educational contexts specifically [4]. The outcomes it identified clustered into four categories: effects on teacher professional behavior (reduced commitment, higher absenteeism, declining performance); organizational outcomes (turnover, weakened school culture); individual outcomes for teachers (burnout, anxiety, reduced wellbeing); and outcomes directed at the leader themselves as teachers withdrew trust and disengaged. None of these are surprising in isolation. What the review makes clear is that they're predictable, documented, and consistent across contexts.
One figure from adjacent research stands out: roughly 20% of teachers' perceptions of work-related stress is explained by their perception of leadership behavior [5]. Not class size. Not curriculum load. Not student behavior. The way leaders treat staff is one of the strongest single predictors of whether teachers are psychologically okay at work.
The behaviors most strongly associated with destructive leadership in school settings are abusive supervision and authoritarianism [5]. Abusive supervision means sustained hostile or demeaning treatment: public criticism in front of colleagues, withholding information strategically, undermining staff in front of students or parents. Authoritarianism means decisions made without consultation and a culture where dissent carries consequences, whether explicit or quiet. These don't look identical in every school. But both have consistent, observable pre-hire signals.
The Retaliation Pattern
One of the most telling markers of toxic leadership isn't what happens inside the school. It's how the school responds to external criticism.
A pattern documented across international teacher communities in recent years involves schools responding to negative reviews not by examining the underlying issues, but by attempting to identify and punish whoever wrote them. This shows up as staff being called in for individual questioning, administrators presenting teachers with printed review excerpts in meetings, and owners threatening consequences for staff who won't identify the source. The instinct being revealed here isn't about reputation management. A school that responds to honest feedback from former employees by hunting for the author rather than asking what prompted the review is telling you something about how it handles internal disagreement too.
This is worth understanding as a behavioral pattern rather than anecdote. Retaliatory cultures at the institutional level are almost always retaliatory at the interpersonal level. Schools that treat honest feedback as an act of disloyalty to suppress are the same schools where raising a real concern with administration quietly ends up on your contract renewal form.
What to Look for Before You Sign
The hiring process is the clearest window you'll have into a school's leadership culture. Most teachers don't use it fully.
Ask who owns the school and how governance works. This question alone tells you a great deal, partly from the answer and partly from the reaction to it. Legitimate schools with stable governance can explain clearly whether they're part of a network, who holds the school accountable, and whether the head of school answers to an educational board or to a private owner. Vague answers, deflection, or "the owner prefers not to be publicly named" are answers in themselves.
Ask about the head of school's tenure and what happened to their predecessor. How long has the current head been in place? What brought the previous person's tenure to an end? A school with three principals in four years isn't just unlucky. Ask what changed and why. Stable schools have heads who can talk openly about their own succession.
Ask how the school handles internal disagreement. Specifically: if a teacher had a serious concern about an administrative decision, what's the formal path for raising it? Schools with healthy leadership culture can describe this clearly because the path actually exists and gets used. Schools with toxic leadership culture give you a non-answer about "open door policies" that turns out to mean nothing in practice. The follow-up is worth asking: can you give me a recent example of a staff concern that actually changed a school decision?
Ask how many department heads or senior teachers left in the past two years. Leadership turnover at the top gets attention, but middle-management churn is often the more sensitive indicator. Department heads are close enough to administration to see how decisions actually get made, and they're experienced enough to have other options when things go wrong.
Research the school's LinkedIn profile before the interview. Look at people who list the school in their employment history and check their tenure. If average teacher tenure sits under 18 months, that's a retention problem worth asking about directly. Also check whether leadership team members appear in external search results or whether all available information comes from the school's own materials. A school where the principal has no public professional presence outside the school website is worth investigating further.
Ask to speak with a current teacher, not one the school selects for you. Any school that won't facilitate this, or offers only a curated shortlist, is worth treating as a caution sign. Teachers at schools with good leadership are generally happy to speak with prospective colleagues. At schools where leadership has created a culture of caution or fear, you often find the opposite: people who agree to the call but give oddly careful answers, or schools that can't find anyone willing to participate at all.
Conclusion
None of this is a guarantee. Leadership changes, and schools that looked stable can shift when an owner sells or a principal leaves. But these questions take twenty minutes to prepare, and the answers tell you far more about a school's leadership culture than anything on their website. Pay attention to what administrators do when the questions get harder than they expected.
