About Us
Get to know the team behind the software and the mission driving our work in healthcare sustainability.
Our Company
In 2009, sustainability was still a new concept. One hospital’s challenge to find a recycling vendor and track their progress sparked a bigger idea: What if sustainability data could be automatically collected, managed, and used to inform critical decisions not just on data but on real information?
Key Green Solutions was born from that idea. A hospital administrator wanted to compare recycling data monthly, quarterly, and annually—but managing the data was time-consuming and complex.
We started with a simple vision: create a comprehensive, user-friendly dashboard. Our platform launched with waste tracking and has expanded to include energy, food, purchasing, and linen. With feedback from our growing user community, Key Green Solutions has become the national leader in sustainability management software.
Our mission is to automate and streamline sustainability data collection to empower more efficient, data-informed decisions. We work directly with vendors to ensure accuracy and turn complex data into meaningful insights. While we stay vendor-neutral, we fully support our clients' goals—whether it’s reducing energy costs or increasing sustainable food purchases.
Since our start in healthcare, we have expanded into other industries including:
- K-12 education
- Municipalities
- Airports
- Zoos and Aquariums
Our mission is to automate and streamline sustainability data collection to empower hospitals to make data driven decisions. We work directly with vendors to ensure accuracy and turn complex data into meaningful insights., We fully support our clients' goals—whether it’s reducing energy costs or increasing sustainable food purchases.
Sustainability isn’t just about being green—it’s also about improving financial health. The data tells the story of every customer’s progress.
We are proud to be the leader in enterprise sustainability management software.
Our Team
Our team is passionate about creating innovative solutions that empower individuals and organizations to thrive in a sustainable future.
Mark Huizenga
Managing PartnerMark is a highly-motivated, results-driven professional with nearly 20 years of proven management consulting expertise. Mark has a Bachelor of Arts Degree in Business Administration from Calvin College and a Master’s Degree in Management from Aquinas College, and a fellow in Political Leadership from Michigan State University. Mark is a Board Certified Medical Practice Executive with the American College of Medical Practice Executives. He has consistently been a high performer: holding senior management roles with Spectrum Health, Health Development International, ProCare Systems as well as other health care organizations. Mark has been an adjunct instructor at Grand Valley State University in Grand Rapids, Michigan. Mark serves as managing partner for Key Green Solutions, LLC
Mark serves on various boards including Health Development International, Grand Valley Metro Council, Michigan Conservative Energy Forum, The Rapid – ITP, The Salvation Army and is an advisor to several medical practice boards.
Mark has been a guest lecturer in Central America, Eastern Europe, South East Asia and the United States.
Jeff Burks
Relationship ManagerJeff is a highly-driven, customer-focused professional with over 20 years of proven information technology and software expertise. Jeff has a Bachelor of Science Degree in Management Science with an emphasis in Decision Support System from Virginia Tech and a Master’s Degree in Human Service Counseling from Regent University. Jeff has worked internationally at Fortune 200 companies leading very complex web-based data conversion projects in the banking and insurance industries. Jeff consistently deepens executive level customer relations by organizing, leading and presenting solutions that address organizational goals and objectives. Jeff is the Relationship Manager with Key Green Solutions.
Jeff has developed industry experience in several categories including:
- Sustainability Metric Tracking and Benchmarking
- Sustainability Dashboards and Executive Reporting
- Sustainability Program Management
Jeff has written articles on using software to successfully manage sustainability and has been a guest speaker in the United States and Canada.
Tim Schuitema
Implementation ManagerTim is a data-oriented, highly-educated professional who serves as the Implementation Coordinator at Key Green Solutions. Tim graduated from Calvin College with a Bachelors of Arts in Business Operations and Psychology. While attending Calvin, he studied in Europe and was introduced to business practices and product development in an international market. Tim also had multiple internships during college focusing on small business development, operations, and supply chain. Tim has previously worked as a logistics coordinator at a trucking company where he negotiated lane pricing, created daily lane routes, and satisfied customer’s requests.
Tim spends most of his free time in the great outdoors. He enjoys playing a round of golf, cheering on sports teams, and spending his weekends at the beach. He loves to travel and has a goal of making it to all 50 states and all 7 continents.
Alyssa Antekeier-Buit
Relationship CoordinatorAlyssa is a graduate of Aquinas College with a Bachelor of Science Degree in Sustainable Business. Her passion for the subject and hard working mentality helped her excel and graduate with honors. While in college, she spent one year working at the Center for Sustainability where, among other things, she helped educate fellow students about the importance of sustainability today. Alyssa spent a semester as the Sustainability Intern for Metro Health Hospital. There she worked in depth with the newly expanded recycling and composting program. Her love for traveling has driven her to volunteer in various regions of the country including South Dakota and West Virginia. Alyssa’s last volunteer experience was spent in New Zealand planting native plant species in bird sanctuaries on the North Island.
Jessica Wittenbach
Relationship CoordinatorJessica is a graduate of Central Michigan University, where she earned a Bachelor of Science degree in Marketing with a Minor in Management. During her time at CMU, she was an active member of Pi Sigma Epsilon, a professional fraternity for students and industry professionals in sales, marketing, and management, where she served as Vice President of Marketing. She was also a dedicated member of Zeta Tau Alpha, an international women's sorority focused on sisterhood, service, and leadership development. Jessica brings a strong background in customer-facing roles, where she developed her skills in sales and management. She takes pride in her ability to build meaningful and lasting relationships with clients, a strength she continues to apply in her current role as a Relationship Coordinator at Key Green Solutions.
Outside of work, Jessica enjoys staying active, spending quality time with friends and family, and participating in her local church community.
Joel Buys
Sr. Data SpecialistJoel is a graduate of Calvin College with a Bachelor of Science degree in Accounting. He has experience in small business accounting. Joel’s background working with numbers and attention to detail helps him excel in data analysis. Joel participated in a semester in New York where he attended briefings, and sessions at the United Nations Headquarters providing him with a unique perspective on the social and environmental issues the world currently faces.
Juleen Haartman
Data SpecialistJuleen received an Associate Degree in Administration from Grand Rapids Community College.
Juleen has 9 years of experience as an Executive Sales Assistant at WZZM Channel 13.
Dianah Walcott
Data SpecialistDianah received an Associate Degree from Grand Rapids Community College.
She was a stay at home mom to her 6 children before joining the Key Green team.
She enjoys volunteering on numerous committees including a run club for girls, Rivertown Races (a community half marathon and 5k event that benefits local charities for children), and activities at school and church.
Sara Meengs
Data SpecialistSara received a Bachelor of Arts in Special Education at Calvin College.
She has worked as an Elementary Special Education Teacher and Job Trainer for teens and adults with special needs entering the workforce. When Sara is not working or following her kids around to their various sports and music activities, she enjoys cooking delicious food for her family, reading, being active in her community, kids’ schools, and church, and planning fun summer camping trips and vacations with her husband.
Jill Behrens
Data SpecialistJill received a Bachelor of Science degree in merchandising from Western Michigan University.
She enjoys the outdoors, traveling, and being a mom to her two children.
Renee Lanning
Data SpecialistRenee received a Bachelor of Science in Nursing Degree at Calvin College.
She has worked as a Registered Nurse for 29 years before joining the Key Green Team.
She enjoys spending time with her family, especially traveling, exploring new places, camping, hiking, and being outdoors. She keeps busy as a wife to Paul, mom of three adult children, teaching First Aid, BLS & CPR classes, and helping care for many family members and friends when possible.