I have been recently terminated from a post where I made $150k+/year for the last 4 years. Am I excluded from claiming unfair dismissal ? My employer does not have a Fair Work Australia enterprise agreement or modern award.
Have you checked out the Fair Work Commission 'Unfair Dismissal - Am I Eligible to Apply?' page? It says: If you were earning more than $129,300 a year and were not covered by an award and did not have an enterprise agreement that applied to you, you are not eligible to make an unfair dismissal application with the Fair Work Commission.
You might like to contact the Fair Work Commission for their thoughts/suggestions. Perhaps you could look further at your employment contract to see if there is a breach of contract issue based on the facts of your situation?
It's obviously difficult to provide any further information without knowing the facts of your termination and you are likely best served by contacting a lawyer near you that is an accredited specialist in Employment Law (ideally, with experience representing managers/executives). It may cost you up to ~$500 for an initial consultation but at least you should gain a clear understanding of your position.
Please keep us updated as to your progress. Good luck!