One Common Goal: Build a Renewable Future

The Big Sun Solar team members share a passion for building a renewable future. Our team brings dozens of years of experience in solar energy, technology and engineering and more importantly, our employees are empowered to do the right thing.

We work with organizations like Venture for America and Students and Startups to bring meaningful jobs to San Antonio. Our 1% pledge encourages our employees to give back to our local community. Together, our team strives to lead in environment and community stewardship.

Interested in joining our team? We’re currently hiring for roles in commercial solar sales and installers. Send your resume to

Meet the Team

Robert Miggins

Co-founder and CEO

Robert co-founded Big Sun Solar to be a part of the future of energy. He believes moving to more renewable energy is not just the right thing to do, but it creates opportunities, jobs and growth. Prior to founding Big Sun Solar, he spent 15 years in executive leadership roles at high growth web hosting and cloud computing companies - first at Rackspace as Vice President Sales and Product Development and then at Peer1 Hosting as Senior Vice President Business Development. He holds a BA in economics from Washington and Lee University and an MBA from the McCombs School of Business. A native Houstonian, Robert lives in San Antonio with his wife and 4 kids. He made the smart switch from being a Rockets fan to a Spurs fan back in ‘99. His timing on other things is rarely that perfect.

Jason Pittman

Co-founder and President

Jason co-founded Big Sun Solar in an effort to help utilities deploy more distributed energy resources using innovative business models. Solar energy should cost less, have a positive user experience and benefit both the customer and utility company. Jason’s 18 years of clean energy and solar PV experience ranges from large utility scale systems and distributed commercial system to the development and execution of utility programs. Jason has previously served as Vice Chairman for Solar San Antonio and currently serves as a Board Director for the Texas Energy Poverty Research Institute (TEPRI) where he tries to leverage solar PV to lower energy burdens in low income communities. He holds a BS in engineering from the University of Texas and a MS degree from the McCombs School of Business. Jason lives in San Antonio with his wife and two children where they hike in the local green spaces and look forward to taking over the downtown streets during SiClovia.

Andrew Wood

Vice President of Sales Operations

Andrew joined Big Sun Solar in hopes to change the way solar energy is purchased - transitioning from a sales process to an educational process. Andrew started in the solar industry in 2009 when there were 39 solar installations in San Antonio. He has been a part of the growth to over 20,000 solar installations throughout the city. His diverse experience in PV ranges from non-profit solar policy and advocacy work, commercial sales and operations, to utility scale programs. He received a Bachelors of Science in Environmental Science from The University of Texas at San Antonio. Andrew currently lives in San Antonio with his wife, two kids and their two golden retrievers.

Kaitlynn Vail

Office Support Manager

Kaitlynn, a native Texan has called San Antonio home since 2007. Her interests include art, singing and antiquing. She is also an avid animal lover and has 5 dogs and 2 cats. After graduating from UTSA in 2012, she began her tech career working for Apple Inc., which led her to San Antonio’s downtown tech district, where she eventually met the Big Sun Solar team. Today she works for them as the Office Manager, supporting the HR, accounting, and IT needs of the company.

Charlie Kirk

VP, Engineering and Construction

Charlie works to bring businesses and neighbors satisfaction by designing and managing solar PV layouts so that they can maximize their clean energy use. After ten+ years of solar project managing and field work, he found his new home at Big Sun Solar in 2019. With 25 years of electrical experience, a State Licensed Master electrician, and a NABCEP Solar PV Installation Professional®, Charlie has been having fun managing construction on Big Sun Solar projects all over San Antonio and neighboring areas. He resides in San Antonio with his wife, two children and their dog. He loves family road trips, anything outdoors, and Mountain Dew.

Brian Regnier

Director of Strategic Partnerships

Brian is an accomplished leader who has led and inspired retail teams and business operations for leading global brands. He found his leadership niche at a high level when he made an industry leap from Apple Inc. to the non-profit world. Brian is a multi-talented professional with expertise in change management, problem solving, and planning.

As a community leader, he has developed strong partnerships, and initiated action to successfully meet goals. He has a strong sense of devotion with a focus on community in the nonprofit sector, environmental issues and the digital divide.

Brian loves San Antonio, Texas and he enjoys time with his wife, 3 kids and 2 dogs. In his free time he enjoys exploring San Antonios expansive trail system and parks.

Angela Bartels

Director of Marketing and Communications

Angela has over 18 years experience in the technology industry, working for companies like Rackspace, PEER 1 (now Aptum) and Scaleworks. She has launched countless marketing campaigns for brands big and small through digital and traditional channels. She approaches marketing with a balance between the creative and analytical mindset, from developing brand narratives to implementing metrics and measuring performance. As a San Antonio native, she is passionate about bringing innovation to San Antonio and has a desire to do meaningful work that will translate into a better future for the San Antonio community.

Angela has her BBA in Management with a concentration in International Business from UTSA and resides in inner city San Antonio with her husband and 3 kids. She enjoys cooking, gardening and running.

Kushagra Chopra

Software Engineer

Kush came to Big Sun Solar through Venture for America. He received his Bachelor of Science in Computer Engineering at the University of North Carolina at Chapel Hill. Kush has an entrepreneurial spirit and has started many different ventures throughout his academic career. If not coding, Kush can be seen in the kitchen. Fun fact: He has baked his own bread for over a year and half as opposed to buying store bought bread. 

Raymond Hoong

Senior Software Engineer

Raymond is a 2020 Venture for America fellow who is originally from Los Angeles. After graduating from UCLA in 2020, he moved to San Antonio to join Big Sun Solar as a software engineer. In his free time, he enjoys going to the gym, hiking, cooking, and playing basketball.

Paty Martinez Peralta

Solar Architectural Designer

Paty Martinez moved to San Antonio in 2008 to pursue a Bachelor’s degree in Architecture from UTSA. Following your graduation, she worked for a couple of design firms before pursuing a Master’s degree in Architecture from UTSA. After receiving her Master’s, she worked for an architectural firm as a project manager helping in the design, construction and documentation of educational buildings for the next 2 years. Sustainability and helping the world was a career goal of hers, that’s why in 2017, she accepted the opportunity to join a design team for a residential and commercial solar panel installer company were she worked for over 4 years and submerged into the solar world. She joined Big Sun Solar in 2022. Paty is a native from Toluca, Mexico and treasures time with her mother and son, friends, colleagues and her dog and cat.

James Morin

Field Manager

James has over 20 years of experience working in the solar industry. He joined Big Sun Solar to transition from residential solar to commercial projects. Certifications include Journeyman Electrician license and has completed his OSHA 30-hour training.

Patrick Thomas

Solar Designer

Patrick has his Bachelor in Mechanical Engineering from Auburn University. He joined Big Sun Solar because he’s excited about renewable energy and wants to be a part of building the future of energy and protecting our planet. He’s a big college football fan, likes camping, fishing, hiking, and really doing anything outside with his girlfriend and dog. 

Leanna Khrystyuk

Vice President of Finance

Leanna spent over 10 years as the Director of Internal Audit and Director of Marketing at Pioneer Energy Services, a company bought by Patterson-UTI Energy, Inc. in 2021. She holds CPA and CISA licenses and has an extensive background in the oilfield services and downstream energy sectors.

Leanna graduated from the University of Wisconsin - Whitewater with a BBA in accounting and has an MBA from the Kellogg School of Management at Northwestern University. A native of Ukraine, she is a founder and current board member of Ukrainian San Antonio, a 501(c)(3) nonprofit organization that provides aid to those affected by the war in Ukraine. Khrystyuk served on the board of directors of San Antonio Education Partnership from 2009-2017 and was its chair from 2016-2018.

Joel Arredondo

Senior Engineer, Team Lead

An Electrical Engineering graduate from Texas A&M University, Joel’s career spans geotechnical sciences, University of Texas at Austin scholastic research, and seven years as a solar industry design engineer. Holding a NABCEP PV Installation Professional certification, Joel is dedicated to leveraging his expertise towards fostering a positive community impact. Joel is a proud Texan who enjoys hiking, camping, culinary exploration, and travel.

Zachary Lopez

Solar Designer

Zach is a proud Texan native and University of Texas San Antonio graduate. He graduated in 2021 with his Bachelors in Electrical Engineering and shortly after received his Engineer in Training Certification with the state of Texas. Following graduation he went into the solar industry to learn about green energy and to be on the forefront of technological innovation.  After 8 months designing residential systems he received his NABCEP PV Installation Professional Certification and afterwards set his eyes on his long-term goal of becoming a state registered Professional Electrical Engineer. A self-proclaimed "Solar Nerd", Zach strives to never stop learning or asking questions. Outside of work, his personal hobbies find him watching action films, taking hikes through San Antonio's beautiful parks, and tinkering with electronics.