Tetra Tech, Inc. (NASDAQ: TTEK) announced today that it has signed a definitive agreement to acquire Norman Disney & Young (NDY), a leader in sustainable infrastructure engineering design. Established in 1959, NDY maintains offices throughout Australia, the Asia-Pacific region, the United Kingdom, and Canada. NDY incorporates innovative technologies and solutions into designs, helping to create environments that use less energy, recycle water, and provide safe and sustainable infrastructure.

Coffey is excited to welcome Norman Disney Young into the Tetra Tech family.

“This is an exciting step in Tetra Tech’s growth within Asia Pacific and for the expansion of our sustainable infrastructure design practice globally.” said Urs Meyerhans President Asia Pacific Unit, Tetra Tech and CEO Coffey.

 “We are very excited to join Tetra Tech,” said Stuart Fowler, NDY’s CEO.  “Tetra Tech expands our ability to provide our high-end services, provides opportunity for technical collaboration, and adds new clients.  We look forward to further developing the science of sustainable design and providing industry-leading technical solutions.”

The acquisition will be subject to the satisfaction of customary closing conditions.