Officers + Board of Directors
Dr. Courtney Bonney
PRESIDENT
Dr. Courtney Grunninger Bonney, PhD, AICP is the President and co-founder of Rhowe Design + Build, a multi-faceted commercial construction and development firm. Courtney has a broad range of experience from her earlier roles as both a professional urban planner and university professor, specializing in historic preservation, urban design, and community revitalization. This broad expertise allows for a comprehensive understanding of the design and development process which is applied to her role at Rhowe Design + Build.
Courtney is also engaged in advocacy through volunteer work in the community with Historic Savannah Foundation, as well as the Coastal Georgia chapter of NAWIC. She lives in Savannah, GA with her husband James and three wonderful boys, Rhodes and Westley, who are the inspiration for their business name, and new addition Gray.
Denille Biddy
SECRETARY
Denille is an experienced Audit Manager with Rushton, LLC, holding a CPA license and the CFE credential (Certified Fraud Examiner). She leads a team that works closely with clients to provide practical, customized solutions, including financial statement services, consulting, and CFO support. Specializing in the construction industry, Denille has earned the CCIFP certification (Certified Construction Industry Financial Professional) to further enhance her expertise.
She is also passionate about serving local non-profits and volunteering her time to help the community. She is President of the GSCPA Savannah Chapter, a member of Rotary of Savannah South, and happy to serve as the Secretary for NAWIC’s Coastal Chapter (National Association of Women in Construction).
Based in Savannah, GA, Denille works remotely and is eager to collaborate with local like-minded women, clients, and professionals. Outside of work, she enjoys spending time with her husband on the beaches of Tybee Island, exploring Savannah’s historic district, practicing yoga, and hanging out with friends.
Sarah Arkins
DIRECTOR
Sarah Arkins is the owner and principal designer of Savannah Kitchen Design, a full-service, high-end residential remodeling firm she founded in 2024. Sarah applies a design thinking approach to home renovations — treating each kitchen and bathroom project as both a design challenge and a deeply personal client experience.
She brings a rare combination of creative vision and strategic rigor to everything she is invested in — the result of 20+ years as a corporate consultant and instructional designer for clients like Microsoft, Deloitte, Coldwell Banker, KBS North America, and Sotheby's International Real Estate.
Penny Harris
DIRECTOR
With more than 25 years in the construction industry, Penny has worn many hats throughout her career and brings a wealth of experience to her current role as Executive Assistant and Estimating Coordinator for H. A. Sack Co., LLC.
Originally from North Carolina, Penny now calls Statesboro home. A Type 1 diabetic for more than 41 years, she brings resilience and a positive outlook to both her professional and personal life.
When she’s not working, Penny loves tapping into her creative side by making hand-pinned quilted fabric ornaments and other crafts. She’s also the proud dog mom to two Chihuahuas, Pinto Bean and Gizmo, who keep life entertaining and full of personality.
Heather Radtke
DIRECTOR
Heather Radtke graduated from Georgia Southern University in 1991 with a Bachelor of Business Administration. In 1990, she started part time with Speros working on marketing projects for her college classes and after graduation she became a full time Speros employee.
Heather moved quickly through the ranks with Speros.
Heather’s first position was Customer Service Representative training the end users on the proper use of their new technology. She was present for most cut-overs, and she observed many installations, this peaked her desire to learn the best possible practices for completing projects. She learned every aspect of the installation process including blue prints, building codes, cabling, main distribution frames, dial tone and meeting project time schedules. She became very efficient and knowledgeable about how the hardware worked, how to install it and she moved into the sales field in the mid 1990’s.
Heather has been a million dollar producer for the Company over the last several years and is an asset to the success of Speros. She has been involved and helped to make all aspects of the technology we sell and service a big success.
Ruth Hutson
Vice President
Ruth Hutson works with SESCO Lighting to help architects and engineers in the Savannah area specify lighting for their projects. She started in live entertainment lighting design and then shaped the next generation of lighting professionals at SCAD where she was a professor for 16 years. Ruth served on the board of the Savannah chapter of the American Institute of Architects and is in her second year as the Service Chair for Metro Savannah Rotary. She has two sons that she loves visiting and shares her empty nest with the smartest man she’s ever known.
Robin Grenchik
TREasurer
Robin Grenchik joined Custom Cabinets as CFO in the summer of 2017 after spending the prior year consulting for the cabinet company and other growing businesses. Although Robin had no experience in the cabinet industry, she had spent several years as COO and Project Developer with Circa Lighting, planning and managing the renovating and build out of showrooms across the United States, as well as two of Circa Lighting’s corporate office locations. Robin has also experienced many a construction / renovation project in her own history of serial entrepreneurship, renovating multiple properties in downtown Savannah for her businesses as well as her own two historic homes.
Robin attended Georgia Southern University, spending her first three years in the Early Childhood Development program before switching her major to Accounting. She has an entrepreneurial spirit and thus spent most of her career working for likeminded companies and owners on the brink of major growth. Her contributions include developing structure and implementing processes and procedures, including employee support and development, to enable successful growth and profitability of the company.
Robin grew up in Augusta GA, but relocated to Savannah after college and now considers it her home for life. Robin is recently an empty nester since her only son just relocated to Philadelphia, so in her free time, she enjoys boating on the Savannah waterways, wining and dining in Savannah’s many great restaurants, hiking, traveling with friends and reading.
Haley Bethel
Director
I found my spot in NAWIC as an Architectural and Design Rep for Garden State Tile. Day to day you can find me meeting with key players of our construction community planning for tile in commercial spaces. I love the variety in my job and that it allows me to build relationships with my clients in and out of the office. When I moved to Savannah, NAWIC helped me grow work connections and create real friendships. As a director and part of the membership committee, I make it my goal to create the same chance for many more women in Savannah.
Alexandra Markgraf
Director
Alexandra Markgraf serves as Regional Manager for the Coastal Region of Evans General Contractors, supporting operations, strategic planning, and business development across the Savannah, Charleston, and Jacksonville offices. Since joining Evans in 2021, she has taken on an expanding leadership role, focusing on collaboration, employee engagement, talent development, and fostering a strong company culture.
Alexandra is passionate about building relationships, mentoring the next generation of construction professionals, and creating opportunities for women in the industry. She is excited to serve on the Board of Directors for NAWIC Coastal Chapter 380 for the 2026–2027 fiscal year.
Alexandra lives in Richmond Hill, Georgia, with her husband, Kevin. Outside of work, she enjoys exercising, taking long walks with her husband, and traveling with their three young adult children.
Dana Starr
Director
With a BA in Communication from Columbus State University, my career has been rooted in service, connection, and community. As the previous Operations Director and Volunteer Coordinator at Faith Equestrian Therapeutic Center, I witnessed firsthand the impact of Metalcrafts, a Tecta America Company, through their generous roof donations and repairs. Their kindness inspired my transition into the roofing industry and my appreciation for the vital role construction plays in keeping communities safe.
I’m a proud mother of three amazing young men who keep me humble. I look forward to supporting NAWIC of Coastal Georgia’s mission, empowering women in construction, and growing both personally and professionally.
Nicole Lee
Immediate Past President
Nicole Lee is the Founder and CEO of Be Smart Home Solutions (BSHS) and a dedicated, sitting member of the NAWIC Coastal Georgia Board of Directors. Bringing over a decade of expertise in Building Science, energy auditing, and renewable energy, Nicole established BSHS in 2022 as a premier energy consulting and installation firm operating across Georgia, South Carolina, Florida, and Virginia. Serving as 2024 President-Elect and stepping into the role of 2025–2026 Chapter President, she leads with a deep commitment to empowering local residents and businesses to achieve energy independence and lower utility costs.
Beyond her technical expertise, Nicole is driven by a love for travel and a lifelong passion for uplifting her community. An ardent advocate for workforce equity, she actively uses her platform to break barriers and foster inclusive spaces for women in the trades. Her dedication to cultivating the next generation of women leaders in construction hits close to home—she is proudly raising and mentoring her daughter, a future woman in construction who is set to graduate in 2027.
Nicole’s leadership and industry achievements have earned her widespread recognition, including the 2024 NAWIC Coastal GA Innovator Award, 2024 Georgia Solar Woman of the Year, 2024 SBAC Business of the Year, SXSW 2023 panelist, and 2025 Shark Tank contestant. She also serves on the Board of Directors for the Virginia Alliance for Clean Energy (VACE), continually advocating for diversity, inclusion, and excellence across the industry.