Mark Stefanac

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Mark is an experienced executive with a demonstrated history of working in the property, infrastructure and construction industry. With over 20 years’ experience leading multi-disciplinary teams in the bidding, delivery and leadership of major projects, Mark is also experienced in town planning, design and construction. Having recently joined Thelem, for the previous 13 years, Mark provided leadership in a well-established global consultancy organisation.


This experience has given Mark a unique and very broad set of project management skills including building, coaching and managing teams, managing project finances and complex stakeholder management.

Sarah Vaughan

Chief Financial Officer
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Sarah is a driven and self-motivated finance and business management advise professional with over 15 years’ experience providing high quality services. With a degree in business, Sarah has demonstrated success in managing project, program, business operations and resources in dynamic environments.

With a background in project development and advisory environments, Sarah is talented at building a strong rapport and working relationship with stake holders at all levels to a high standard. She is an exemplary communicator and an articulate individual, with a positive and friendly demeanour.