PAE ENGINEERS - Key Persons


Alan Shepherd

Job Titles:
  • Mechanical Engineer
  • Principal
Alan is a mechanical engineer with over 35 years of experience. Passionate about building systems and performance, Alan seeks sustainable solutions by helping clients obtain a clearer understanding of how they can measurably achieve their project goals. He excels at working closely with architects, owners, and fellow designers to produce integrated passive and active building systems that deliver high-quality building environments. Alan is a frequent speaker on high-performance design and has authored papers on the integration of building systems and facades. Education Master of Science, University of Cambridge, UK Bachelor of Engineering (1st Class Honors), Northumbria University, Newcastle, UK

Alper Erten

Job Titles:
  • Senior Associate
Alper provides expertise backed up with a decade of mechanical engineering experience to a range of global, large-scale environmental design projects. He is uniquely skilled at developing effective sustainable and holistic solutions, substantiated by analysis and simulation. He specializes in design of high-performance building envelope and mechanical systems which includes optimizing water and energy consumption, post-occupancy measurement and verification, thermal-comfort modeling, detailed building analysis, reporting, and data visualization. Alper takes pride in guiding sustainable projects from inception to successful execution. Education Master of Science, Mechanical Engineering, University of Southern California, Los Angeles, CA Bachelor of Science, Mechanical Engineering, Bogazici University, Istanbul, Turkey

David Mead

Job Titles:
  • Associate
  • Principal
David leads the Regenerative Design Group at PAE, bringing experience as a high performance building specialist and architect. He works to integrate engineering and architectural solutions into unified sustainable designs which involves research, innovation, engineering, and verification of concepts. He has extensive experience in sustainable design including greenhouse gas inventory tracking, passive building strategies, renewable energy system design, and the creation of sustainability guidelines for large organizations. David is a committed advocate for net-positive buildings and brings an innovative approach to GHG and energy analysis to advance building performance toward carbon neutral and regenerative strategies. Education Bachelor of Architecture, Iowa State University, Ames, IA

James Saywell

Job Titles:
  • Senior Associate
Jim is part of the Regenerative Design Group with over two decades of experience as an architectural engineer. He has a focus on high-performance and solutions that are replicable and renewable, leading many of the Los Angeles-based projects. With a background in European design, Jim has a passion for the innovation behind carbon neutral and regenerative strategies. He favors a client-focused approach that leans on understanding goals and needs to develop a strategy, and relies on collaboration throughout the project timeline. Education Master of Engineering, Architectural Engineering, University of Leeds, Leeds, United Kingdom Bachelor of Architectural Engineering, Penn State University, State College, PA

Karina Hershberg

Job Titles:
  • Senior Associate
Passionate about sustainability, Karina has 15 years of experience with systems modeling, data analysis and electrical engineering for high performance buildings and renewable energy systems. She brings a unique perspective to her dual roles in analysis and engineering at PAE. Through data-driven analytics and innovative design, Karina helps projects implement regenerative and resilient solutions. She leads the development of microgrid design, emissions analysis, and campus-scale solutions for the firm and is a regional leader for PAE's Regenerative Design Group. Education Master of Science, Engineering and Technology Management, Portland State University, Portland, Oregon Bachelor of Science, Electrical Engineering, Oregon State University, Corvallis, Oregon