The SunSource Team

Kansas City's leader for solar installation, renewable energy, green architecture and more, SunSource can assist you with all of your residential or commercial building needs. Our experience in many areas within the architecture industry, including commercial projects, environmental design, passive solar design, energy storage, and solar PV systems have positioned us to serve as your sustainable construction, green remodeling, and renewable energy system company. 



Keith Graepler – Principal

General Contractor, Sustainable Energy Specialist

Keith GraeplerKeith has a broad-based background in systems design and general construction. He lived in Colorado until 2008 when he moved to Kansas City. He has spent the last 9 years working with Renewable Energy systems design and installation, energy conservation in residential and commercial buildings, lighting system design for energy efficiency and light quality, energy auditing, geothermal GSHP system design and installation, advanced insulation techniques and wall assemblies, potable water filtration system design and installation, and Solar PV System design and installation. He has managed, designed, and supervised installation of Solar PV systems for a total of over 3.1MW since 2007 in Kansas, Missouri, Nebraska, Illinois, Colorado, Wyoming, Oregon, Minnesota, and Washington.

Motivated by the positive impact that SunSource has on the environment, Keith is passionate about future sustainable development opportunities all over the world!

Keith is a graduate of Solar Energy International (SEI).


John Ingraham

Senior Architect John Ingraham

Having spent his formative years creating designs with Legos, Lincoln Logs, and just about anything he could get his hands on and scouring Popular Science and Popular Mechanics magazines for the latest developed technologies. John knew at a young age that he wanted to work in the field of architecture. Years later with his Bachelor’s of Architecture degree from the University of Kansas, John has close to thirty years of experience in the field of Architecture. As a Project Architect/Manager, John has been responsible for projects ranging from residential, schools, courthouses, restaurants, sports, and medical facilities and corporate offices. He provides an in-depth understanding of the design and construction process from early programming and site analysis through project construction. This, combined with his desire to work in concert with clients in helping them to attain their dreams, makes for a positive experience for the life of the project. 


Carly Riley

Designer/Architectural Intern Carly Riley

Carly grew up in rural Oklahoma where she began learning about the building process at a young age from her parents and grandfather. Adding additions and renovations to her home and the ranch were commonplace throughout her childhood and she knew from an early age that was the direction she would go with her career. She decided to combine her interest in building and love of the outdoors into a career in sustainable architecture.

Carly completed her undergraduate degree in Iowa at Grinnell College where she majored in Art and minored in Environmental Studies. From there, she went directly into graduate school for Architecture, graduating from Iowa State University in 2016.

In her free time, Carly enjoys traveling, spending time with her fiancé, is an avid cyclist, and will use any excuse to spend time outdoors. 



Justin Castleman

Inside Sales Support Justin Castleman

Justin is a life-long Kansas Citian and earned his Bachelor’s Degree from Benedictine College.  Coming from a big family Justin quickly realized the importance conservation.  On non-work days you will find him tending to his lawn and landscaping, golfing, and spending time with his fiancé and 1 year old son.

Justin’s work background consists of many industries including construction, healthcare, and communications.  While in the construction industry in 2008 he focused mainly on masonry and waterproofing. In 2014 he entered the renewable energy industry with a desire to make a positive impact on the world.   Justin has designed and managed solar projects totaling 300KW and has been member of the NFPA since 2015.  He has solar experience in New York, Massachusetts, Rhode Island, Connecticut, New Jersey, California, Kansas and Missouri.  


Greg Hynes

Greg Bio Picture

Construction Foreman

Greg has a strong focus and commitment to excellence for himself and the Sun Source team. As the Solar Installation Foreman, Greg is an expert at communication in the construction field. He spends the extra time needed to effectively communicate with the customer and guarantee the work is of the utmost professional quality. Greg has the leadership skills, motivation, and dedication to go above and beyond the call to completely satisfy the requirements of professionalism and customer needs when SunSource is finished with your project.

Greg has spent the last 8 years as a crew foreman installing over 2,000,000 Watts of Solar PV systems in a variety of styles in Kansas, Missouri, Colorado, Nebraska, and Minnesota. Greg's work background includes masonry, excavation, landscaping, and HVAC.