Trilon Group, an infrastructure consulting business backed by Alpine Investors, is partnering with DRMP Inc. and ESI Consultants (ESI) as part of Trilon’s plan to build the top 20 infrastructure services firms in North America. Financial terms were not disclosed.

With the new partnership, Trilon will launch its National Transportation platform and expand geographically in the Southeast and Midwest. DRMP and ESI will continue to operate independently under existing brands and will keep top leadership.

DRMP is an engineering and surveying firm that develops infrastructure for both the public and private sectors. ESI is an engineering and architectural consulting services firm.

Trilon CEO Mick Renshaw said, “We are excited to support both companies by investing in talent, technology, and targeted M&A to help them accelerate their growth ambitions. By serving as a growth accelerator for quality firms, Trilon can help firms expand the services they provide to their clients and the career advancement opportunities they can offer their employees.”