stars 1 stars 2 stars 3

We apply smart thinking and analytical rigor to solve the world’s biggest infrastructure, resource, and policy challenges. At Castalia we use our knowledge, skills and experience to question and redefine how the infrastructure challenges of the world are solved. We are experts in the finance, economics, law, and policy of infrastructure, natural resources and social service provision. We are passionate about finding solutions to the world’s most complex infrastructure problems in those fields, knowing that in doing so we can make the world a better place. Since 1980 we have grown in staff numbers and global presence. We have over 65 members of staff, and offices in: Washington DC, USA; Auckland and Wellington, New Zealand; Sydney, Australia; Bogotá, Colombia; and Paris, France. Castalia is the trusted advisor of corporations, utilities, governments, international agencies and infrastructure investors around the world. We solve complex, strategic assignments and deliver sustainable, measurable results.

Castalia Questions

The Castalia annual revenue was $5.6 million in 2026.

David Ehrhardt is the Chief Executive of Castalia.

75 people are employed at Castalia.

Castalia is based in Washington, District of Columbia.

The NAICS codes for Castalia are [5416, 541, 54161, 54, 541611].

The SIC codes for Castalia are [6211, 621, 62].

Top Castalia Employees

View Similar People
G2 Leader Summer 2026 G2 Best Est ROI Mid-Market Summer 2026 G2 Easiest Admin Mid-Market Summer 2026 G2 Most Implementable Summer 2026 G2 Best Results Mid-Market Summer 2026 G2 Lead Capture Mid-Market Summer 2026 Inc Fastest Growing Private Companies 2026 Inc Best Workplace 2026
g2crowd
G2Crowd Trusted
chromestore
300K+ Plugin Users