Peter Alspach, PE, LEED AP

Principal, Director of Design Performance

As a mechanical engineer, building physicist and façade engineer, Peter leverages a unique skill set to develop holistic sustainable façade and formal solutions to the built environment.

As the firmwide design performance and sustainability leader, Peter focuses on finding creative solutions to meet his client’s needs, with an early project focus on active listening and client engagement. Peter mines his diverse project history to create new multi-disciplinary integrated design solutions that do not rely on the repetition of conventional strategies of the past. Over his 26 year career, Peter has become a nationally a recognized leader in building physics, energy simulation and sustainable design optimization contributing to a myriad of awarded projects.



Years at NBBJ

Other Practice


Total Experience



Master of Civil Engineering in Building Systems & Renewable Energy Technology, University of Colorado, Boulder

Bachelor of Mechanical Engineering, 1992 Washington University in St. Louis


Professional Engineer: CA, OR, WA

Professional Affiliations


ASHRAE Environmental Health Committee

IBPSA USA Board of Directors

LEED AP Building Design + Construction

Project Experience

PenPlace SD-CA

Arlington, Virginia

Design Performance Lead

Seneca - Bellevue 600

Bellevue, Washington

Design Performance Lead

Seneca -Bellevue 600

Bellevue, Washington

Design Performance Lead

SSA Marine - Terminal 46

Seattle, Washington

Design Performance Lead

Seneca - Bellevue 600 HPBC

Bellevue, Washington

Design Performance Lead

Spectrum Health CTI

Grand Rapids , Michigan

Design Performance Lead