Administrative and Research Intern

Castalia is seeking a candidate for a part-time internship based in our Washington, DC office, working 10–16 hours per week on-site, with the possibility of increasing to 20 hours per week as needed.

The internship will run for six to nine months, with a preferred start date of 26 October 2026, or another mutually agreed date. It may also be extended or lead to a full-time position, depending on performance and business needs.

The intern will gain hands-on experience in a dynamic international consulting environment while supporting office operations and administration activities.

Key responsibilities include:

• Managing reception duties, welcoming visitors, maintaining an organized office, and coordinating day-to-day office activities.
• Providing administrative support to the Washington, DC team, including scheduling, document preparation, and records management.
• Assisting with HR-related activities, including employee onboarding, recruitment coordination, and internal team initiatives.
• Preparing written and visual materials, including presentations, reports, and other documents for internal teams and clients.

Additional opportunities (based on interest and skills, but not required):

For interns interested in gaining exposure to Castalia’s consulting work, there may also be opportunities to:

• Conduct economic, financial, and policy research to support consulting projects.
• Support business development activities, including market research and proposal preparation.

Who we’re looking for

• At least one year of relevant professional experience. Experience in professional services, particularly consulting, is a plus
• Currently pursuing or having completed a degree in Business Administration, Communications, Economics, Finance, Public Policy, or a related field
• Excellent written and verbal communication and presentation skills
• Ability to manage multiple priorities in a fast-paced environment, with strong organizational skills and attention to detail
• Advanced proficiency in Microsoft Office applications, particularly Word, Excel, PowerPoint, and Outlook.
• A proactive, adaptable, and collaborative attitude, with a willingness to learn.
• Authorization to work in the United States.

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:

You will need the following information and documents ready.

• Cover letter and resume/CV
• Two professional references
• Academic transcripts

Application closing date: 26 October 2026

Due to the volume of applications we receive, we will only contact shortlisted applicants.