Thinking ahead and conserving resources

RETTEW is committed to minimizing our impact on the environment through sustainable practices. In addition to our focus on resource conservation and sustainable design projects, we are committed to behaving in an environmentally responsible way in our everyday business practices.

Our sustainability policy outlines the steps RETTEW is taking to remain an eco-friendly community partner. This policy contributes to our purpose to improve the quality of life for the communities, clients and employees we serve.

Institute for Sustainable Infrastructure

The Institute for Sustainable Infrastructure (ISI) was founded to create and uphold a sustainability system for all civil infrastructure projects. ISI consists of individuals and organizations involved in the planning , design, construction, and maintenance of infrastructure.

Our Involvement

“Our clients desire measurable ways to implement their sustainability programs. The Envision Program allows RETTEW to assist our clients in their decision-making process, leading to more comprehensive project solutions that consider the long-term benefits of infrastructure investment.” – National Market Leader, Energy and Environmental Engineering, Jason Wert, PE, BCEE, ENV SP


Envision is a rating system for sustainable infrastructure, maintained by a growing number of respected infrastructure-related organizations. Envision delivers free direction on sustainable best practices, serving as a planning and design tool and an evaluation tool. By providing a holistic framework, Envision provides guidance for all project aspects and stakeholders. Envision uses a transparent metrics system, which encourages self-assessments, third-party verifications, and awards. For additional information, please see our Envision Fact Sheet.

 ISI Member

Supporting Communities

RETTEW’s purpose is to improve the quality of life for the communities, employees, and clients we serve.