Location: Sydney, Australia

Castalia is seeking candidates for up to two internship positions based in our Sydney office. The interns would be responsible for:

- Conducting economic and financial research, analysis, and modeling;
- Producing written and visual outputs to clearly and concisely communicate the results of their analysis and modeling to clients; and
- Assisting with business development efforts.

The internships are available on a full time or part-time basis, ideally with a minimum commitment of 16 hours per week. The internships are expected to run for a 12-month period, with the possibility of an extension or a transition to a permanent position.

Who we’re looking for

Castalia is seeking candidates who are currently enrolled in a relevant graduate or undergraduate program (for example, International Economics, Finance, or Public Policy) and expect to graduate in the next 18 months or have graduated in the last 12 months.

- Currently pursuing or recently completed a degree in Economics, Finance, Engineering, Engineering Science, Law or Applied Mathematics
- Excellent research and analytical skills, along with strong presentation and communication skills




- Excellent written and verbal communication skills in English; fluency in other languages is an advantage
- Authorization to work in Australia.

About Castalia

At Castalia, we use our knowledge, skills, and experience to question and redefine how the world's infrastructure challenges are solved. Thinking for a better world is more than our tagline – it is our driving philosophy. Founded in 1980, Castalia has over 40 years of global experience advising private sector investors, governments and international donor organizations on infrastructure. Castalia has undertaken assignments in 144 countries globally.

How to apply

If you are interested in this position, please apply directly on our website: https://castalia-advisors.com/join/

You will need the following information and documents ready.

- Cover letter and resume/CV
- Two professional references
- Writing sample
- Academic transcripts

Application closing date: 6 November 2026

Position start date: 27 January 2027

Due to the volume of applications we receive, only shortlisted candidates will be contacted.

📌 Intern: Economic and Financial Research (Sydney)
🏢 Castalia
📍 Sydney