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Paul Crisman, CEM, LEED AP

Co-Founder | Senior Principal

As a founder of 4C Solutions, Paul brings over a decade of experience in operations, consulting, and applications which has allowed him to obtain experience with virtually all types of HVAC technologies. He brings an industrious approach to each and every project to fulfill the commitment made to clients through 4C Solutions’ 4 core principles. From working at small firms to one of the largest HVAC manufacturers in the world, Paul brings unique experiences and knowledge to help clients achieve the outcome desired for their buildings.

Paul graduated from James Madison University with a B.S. in Integrated Science & Technology where he focused on energy and engineering. His other certificates and certifications include: Air Conditioning and Refrigeration Certificate from Northern Virginia Community College, Certified Energy Manager, LEED AP BD+C and EPA 608 Universal Refrigerant Certification. In addition, Paul has also been published in HPAC Engineering magazine for his prior work with air cooled chillers.

When he’s not working hard to grow 4CS with fellow business partner Jake, Paul enjoys watching and partaking in an array of sports, perfecting his ingenuity as craftsman, fixing up his 1900’s farmhouse and being active outdoors. He’s always up for a laid-back evening with his wife, hosting friends and putting his grill master skills to good use.

Go Dukes!


Jake McGillis, E.I.T.

Co-Founder | Principal

Jake’s combined interest in engineering and business led to him becoming a Co-Founder of 4C Solutions. As the lead commissioning engineer, he has handled over 40 projects, ranging from restaurants to large commercial buildings and nearly everything in between. Jake has developed critical business skills from prior work experiences with two startups as well as two early stage companies, bringing a competent business perspective to 4CS.

Jake graduated from the Virginia Tech Mechanical Engineering program with a minor in Green Engineering. As he likes to joke, the program was 13th in the nation when he started, but 16th in the nation when he finished. Upon graduation, he passed his Fundamental Engineering exam and is currently studying for his Professional Engineering exam. Jake also serves as a volunteer co-chair on the USGBC NCR Education Committee to plan and execute regular educational programs for the local green building industry.  

When he’s not humbly bragging about the Virginia Tech Hokies, he enjoys the outdoors, music, and travel. In fact, before officially joining 4CS, he took six months to travel to three continents: Africa, Asia, and Europe. The highlight of the trip was a two-month motorcycle ride through Vietnam where he drove over 2,000 miles. But that time away didn’t change Jake’s interest in the construction world. While he was traveling, he was particularly fascinated by the strategies employed in the developing regions: bamboo ladders and scaffolding, sun hats instead of hardhats, flip flops over boots, and pulleys rather than cranes. Now Jake is excited to officially be back in the construction world and ready to take on the challenge of growing 4CS’s business with his good friend and business partner, Paul.

Go Hokies!


Doug Smith, PE, LEED AP

Senior Advisor

As Senior Advisor, Doug brings unique experience from all sides of the commercial building and energy industry including strategic planning, construction management, engineering, sales, manufacturing and R&D. Throughout his career, he has been the founding partner of three companies, and has held the position of Vice President & General Manager for a premier heat transfer design and manufacturing company.

Doug began his career as an officer with the United States’ Navy Civil Engineer Corps where he held positions of increasing responsibility including planning and development oversight for facilities at the U.S.’ largest Naval Training Center.  Doug then moved to private industry where he led the engineering department for a design-build mechanical contracting firm that specialized in commercial and industrial mechanical plant retrofits. He would later go on to be the founding partner of a MEP design firm for 8 years before accepting a position as a Director and eventual VP/GM at a leading heat transfer equipment company. Doug leveraged these experiences to establish two companies focused on developing and commercializing high value system packages for the HVAC and plumbing markets.  One of the companies is focused on R&D, engineering and design while the second brings the corresponding solutions to market.  Doug’s role at 4CS is to provide expert insight on technical aspects of MEP commissioning and to provide oversight in the development and growth of 4CS as a whole.

Doug’s formal education includes a masters in Mechanical Engineering from the University of Illinois, Chicago, Navy Civil Engineer Corps School, Navy Officer Candidate School, and an undergraduate degree in Mechanical Engineering from Virginia Tech; thereby tipping the scales in the VT vs JMU battle towards VT.

Go Hokies!