
Helping leaders and teams move successfully through points of inflection.
Pivoting Strategy?
Scaling Quickly?
Living a challenge you can't quite get on top of?
Anthiva helps you move forward.
Signed in as:
filler@godaddy.com

Pivoting Strategy?
Scaling Quickly?
Living a challenge you can't quite get on top of?
Anthiva helps you move forward.
That is what the leaders we work with tell us. Usually leaders who are deeply committed to their people but stuck in the momentum of the role, knowing they could be leading better if they could just find the space to do it.
At Anthiva, we help senior leaders build people focussed cultures that perform. Because you cannot get one without the other.
Every engagement starts with a diagnosis. We look at the full picture: the person, the culture, the clarity, the alignment, and the conditions. Understanding what is really driving performance, and what needs to change, comes before any action.
From there, action planning: moving forward with intention instead of stalling with the problem, co-designing a practical plan with your leadership team and other key people to ensure that there is clarity and movement.
Petra Siskos is the founder of Anthiva


Beyond Performance, our signature program. A practical way of working with leaders and teams at points of inflection.
Whether the challenge is growth, change, complexity, stalled performance or something that is no longer working as it should, we help you move quickly beyond surface-level fixes.
Together, we identify what is really getting in the way, understand the cultural, operational, structural and capability conditions shaping performance, and focus on the interventions that will make the greatest difference.
The result is clearer priorities, stronger alignment and a more effective path forward.

Embedded strategic leadership support, without the commitment of a full-time hire.
Embedded Leadership is for organisations that need experienced support to maintain momentum, move a critical piece of work forward or create capacity at a point of pressure or change.
This might include stepping in while you recruit for a permanent leader, providing fractional leadership where a full-time role is not yet required, conducting a review, implementation planning or taking ownership of a project, framework or priority that has remained stuck on the list.
We work alongside your leaders and teams to quickly understand what is needed, bring structure and momentum, and deliver practical outcomes across people, operations, change and performance.
Available through fractional, interim and project-based engagements.

One-to-one executive coaching for leaders who give everything to others.
Monthly or fortnightly sessions over an initial three-month engagement create the space to think clearly, lead well, and achieve your goals. No agenda but yours.
Focused entirely on what you need, to perform and lead with clarity.
Copyright © 2026 Anthiva - All Rights Reserved.
ABN 51171130897
We use cookies to analyze website traffic and optimize your website experience. By accepting our use of cookies, your data will be aggregated with all other user data.