Senior Team

J. Douglas Tebera, PE


Doug Tebera has served as President and Managing Principal of the firm since December 2007. Since starting with the firm he has served as Director of Electrical Engineering as well as Project Manager. The same focus on value and teamwork that contributed to the success of projects including the APL District Utility Plant, DEA Research Laboratory, and the Boston Opera House restoration, now form several of the cornerstone principles he uses in leading our firm. Doug holds a Bachelors of Architectural Engineering from The Pennsylvania State University and an MBA from the University of Baltimore. Doug is registered in several states. He has served as President of the Maryland IESNA Chapter, Board Member of Maryland IEEE/IAS, and Chairman of the ARCOM Masterspec Engineering Review Committee.

Donald F. Steiner, PE


Donald Steiner focuses on government, infrastructure, and medical projects. He oversees the firm’s quality assurance program. He is a graduate of The Pennsylvania State University with a BAE and earned an MBA from Loyola University, Maryland. Don was an active committee member in the development of the ASHRAE 90.1 Standard that forms the basis for modern energy codes. He remains active as a member of ASHRAE, ASPE, NFPA, CSI and ICC. He has also served the community as a member of the Building Facilities Committee for the Cathedral of Mary Our Queen.

Scott R. Haythorn, PE, LEED AP, CEM


Scott Haythorn is a leading consultant in the construction of central plants and utility projects. In addition, Scott has led several of our projects in the academic, government, and historic market sectors. He is extremely focused on the importance of helping clients satisfy their mission within schedule and budget. As a Certified Energy Manager he has the proven credentials to model and analyze various energy efficiency measures and life cycle costing to present the most appropriate system options for the budget. Scott is a graduate of the University of Maryland Baltimore County. He is also credited with designing a wide array of project types that achieved various levels of LEED Certification. Scott is an active member of AEE, ASHRAE, and SAME.

Jeanne S. Tebera, PE, CFPS


Jeanne Tebera is a senior electrical engineer focused on a variety of market sectors including government, historic, cultural, and academic construction. She is a graduate of Loyola University in Maryland. Her experience includes design of normal, standby, and emergency power distribution. She focuses on low-voltage construction work and specializes in fire protection, lighting controls, security, and communication systems. She has been an instrumental team member on many of our LEED Certified projects, including LEED for New Construction – Platinum and Commercial Interiors – Gold. Jeanne is an active member of AFAA. She is also active in the community, serving on the Board of the Greater Parkville Community Council. She served as Vice President of the Saint Ursula School Board and as a member of the Building Facilities Committee.

Nathaniel B. Krumpe, PE


Nathaniel Krumpe is extremely thoughtful in his approach to integrating various mechanical and plumbing systems for commercial, mixed-use, housing, cultural, and healthcare construction. He’s accomplished in a variety of construction sectors and has completed multiple projects for private and public clients. He is extremely experienced at conducting energy audits and energy modeling. Nathaniel holds a Bachelor of Science in Mechanical Engineering from The Pennsylvania State University and an MBA from the University of Baltimore. He is a member of ASHRAE and SAME.

Rebecca L. Koch, CxA, LEED AP O+M, CMVP


Rebecca Koch has 25 years of experience in commissioning, project management, and energy/sustainability in the design, construction, and operation of facilities and building systems. Her MEP commissioning projects include LEED and non-LEED projects in a variety of market sectors, including K-12, higher education, mission critical, office, library, retail, and central plants. Additionally, she provides LEED consulting across all credit categories, LEED online activities, and the management of LEED projects. Her energy service experience includes development of benchmarking and energy management programs, building energy audits, and energy savings performance contracts. She is a member of USGBC and SAME.