Bristol Stickney has been designing, manufacturing, repairing and installing solar hydronic heating systems for more than 30 years. He holds a Bachelor of Science in Mechanical Engineering and is a licensed Mechanical Contractor in New Mexico. He is the Chief Technical Officer for SolarLogic LLC in Santa Fe, N.M., where he is involved in development of solar heating control systems and design tools for solar heating professionals. Visit www.solarlogicllc.com for more information.

Max Rohr is a graduate of the University of Utah and manager of REHAU Academy in Leesburg, Virginia. He has worked in installation, sales and marketing in the hydronics and solar industries since 1998 and writes this column in his personal capacity. The views expressed are his own and do not necessarily reflect those of the company he works for. He can be reached at max.rohr@mac.com and on Twitter @maxjrohr.

Jay Egg is a consultant and designer of geothermal HVAC systems, in addition to being author of two books and several articles on the subject. He is the Founder of Egg Systems, and focuses on geothermal consulting, engineering, and contracting technologies. He can be reached at jayegg.geo@gmail.com.

Steven Nudelman is a partner at the law firm of Greenbaum, Rowe, Smith & Davis LLP in Woodbridge and Roseland, New Jersey. He is a member of the firm’s Litigation Department and its Construction, Alternative Dispute Resolution and Alternative Energy & Sustainable Development Practice Groups. He may be reached at (732) 476-2428 or snudelman@greenbaumlaw.com.

Timothy Allinson is chief plumbing engineer at ACCO Engineered Systems. He holds a BSME from Tufts University and an MBA from New York University. He is a professional engineer licensed in both mechanical and fire protection engineering in various states, and is a LEED accredited professional. Allinson is a past-president of ASPE, both the New York and Orange County chapters. He can be reached at lagunatictim@gmail.com.

Ron George, CPD, is president of Plumb-Tech Design & Consulting Services LLC. Visit www.Plumb-TechLLC.com.

Samuel S. Dannaway, P.E., FSFPE, is a licensed fire protection engineer and mechanical engineer with bachelor’s and master’s degrees from the University of Maryland Department of Fire Protection Engineering. He is a past president and fellow of the Society of Fire Protection Engineers. He is vice president of Fire Protection Technology at Coffman Engineers Inc., a multidiscipline engineering firm with over 360 employees across eight offices. Sam can be reached at dannaway@coffman.com.

John Gregory, mechanical coordinator in HDR’s Phoenix architecture studio, has 28 years of experience in medical gas systems design and inspections, process piping, plumbing and fire protection systems design for multiple business classes. He coordinates projects with HDR’s clients, and he supervises team members on plumbing, process piping, fire protection and medical gas systems. John is a certified medical gas inspector NITC 6020. He serves on the NFPA 99 Technical Committee for piping and installation, and he is a co-chair of the P.I.P.E. Medical Gas Committee in Arizona. He can be reached at john.gregory@hdrinc.com.

Cory Powers, CPD, is an associate at HGA Architects and Engineers office in Milwaukee, Wisconsin. HGA is a top-10 national health care design firm with additional practices in energy and infrastructure, corporate, arts and higher education. Cory has a B.S in Architectural Engineering from the Milwaukee School of Engineering. He is a licensed master plumber and certified in plumbing design (CPD). He has been a member of the American Society of Plumbing Engineers (ASPE) since 2008, previously serving as president of the ASPE Wisconsin chapter. Powers currently serves on the ASPE National Board of Directors as the AYP chair. He can be reached at cpowers@hga.com

Calina Ferraro, P.E., CxA, CPD, LEED AP, is a mechanical associate principal at Randall Lamb, a consulting engineering firm specializing in for mechanical and electrical systems. She plays a key leadership role spearheading the company’s sustainable design group, managing projects and leading design teams. Ferraro’s project experience includes commercial, science and technology, health care and institutional market sectors. She is an active member in a number of industry groups including the American Society of Plumbing Engineers (ASPE), currently serving on the Women of ASPE committee; ASHRAE; and the USGBC. She can be reached at CFerraro@RandallLamb.com.

Pete DeMarco is the executive vice president of Advocacy and Research for the IAPMO Group. His responsibilities include oversight of IAPMO’s government relations department, water efficiency and green building initiatives, standards development activities, domestic and international plumbing programs, industry outreach programs and development of research projects relating to water efficiency. DeMarco is the founder of the Plumbing Efficiency Research Coalition (PERC), an organization dedicated to conducting research pertaining to plumbing systems in consideration of the emerging trends towards lower water consuming plumbing fixtures and appliances. He is the lead facilitator for the American National Standards Institute’s Energy Efficiency Standardization Coordination Collaborative. Notably, DeMarco also co-chaired the Steering Committee for Water Efficient Products, which helped to foster the development of the U.S. EPA WaterSense program. He currently serves as Chair of the Board of Directors for the Alliance for Water Efficiency (AWE) and previously served on the Board of Directors and on the Executive Committee for the Plumbing Manufacturers International (PMI). You can reach him at pete.demarco@iapmo.org.

Carol Johnson is a project manager for Edmonds Engineering EEI. She has been in design and project management for 28 years. She is responsible for designing as well as educating and developing standards for EEI. She specializes in Fire and Plumbing for hospitals and commercial projects. She is the current ASPE VP Legislative and sits on multiple committees. She has been recognized as a leader in the plumbing industry and holds multiple credentials LEED AP, CFI, CPD. Reach out at CJohnson@Edmondsengineering.com.

Charles W. Hammock Jr., P.E., LEED AP BD+C, CGD Principal at Andrews, Hammock and Powell, Inc. has 35 years of experience in the engineering of HVAC systems for governmental, industrial, commercial and institutional clients at facilities throughout the U.S. and internationally. For more information, visit www.ahpengr.com.

Lindy Gibbons, CPD is an Associate Principal and Plumbing/Fire Protection Department Lead for Meyers+ Engineers in San Francisco. After working in New York City and San Francisco for more than 13 years, she has gained experience in almost every market sector, including educational, government, residential and commercial, and in a multitude of geographic locations both in the U.S. and internationally. On the design side, Gibbon's focus is on high-rise mixed use buildings with integrated sustainable solutions. As department head, she is responsible for technical standards, staff training, and quality control. Some of her projects include Rutgers Livingston Business School, Thurgood Marshall U.S. Courthouse, 181 Fremont, and City Center Bishop Ranch. Gibbons graduated with a Bachelor’s in Engineering from Stevens Institute of Technology. She also serves as the ASPE Vice President Technical for the SF Chapter.