Cyndee Herrin


Cyndee has been a long-time business partner of Dave R. Williams Homes, and she became owner in June, 2017. Cyndee brings with her over 30+ years of experience in real estate development as well as home building. She continues to move the company forward with the same philosophy and culture that established Dave R. Williams Homes as THE luxury home builder in Prosper and Celina. 


Gary Castleberry

Vice President & General Manager

A life-long resident of the Frisco/Prosper area of Collin County, Gary joined Dave R. Williams Homes in 2004 as a Construction Manager. In January 2016, Gary was appointed  Vice President and General Manager. His dedication to the company, our clients and the ability to do the right thing at the right time have earned him this title. Since 1981, Gary has managed residential construction projects of all scopes and sizes and was awarded the Town of Prosper's Construction Manager of the Year in 2013 and 2006. He was also nominated by the Home and Apartment Builders of Metropolitan Dallas as 2007's Builder Associate of the Year. Gary's experience, knowledge, and integrity have earned him the respect of his industry peers, Prosper and Celina's code enforcement officials, and Dave R. Williams Homes clients.


Mark Sena

Manager of Sales and Marketing

Mark started his career in the home building industry in 1978 when he became General Manager of an insulation contracting company. In 1982, Mark opened SunTex Insulation which became among the largest insulation contractors in the Dallas-Ft Worth area. During this time he also built homes as well as a commercial office building. In 1993, Mark entered the home building field as an on-site sales representative. Mark has represented 3 of the largest volume home builders in the area, and is a licensed real estate agent. Mark joined Dave R Williams Homes in March 2010 as Sales and Marketing Manager. In his free time, Mark enjoys playing golf and playing guitar and vocals with his band in many local venues.


Phone: 214-906-8361

Patty Diveronica

Operations Manager

Since 1994, Patty has coordinated the financial, warranty, and customer service aspects of home building. Patty's attention to detail and years of experience allow her to provide exceptional service as operations manager, company coordinator, and customer service liaison.


Cheryl Grant

Interior Design Professional

Cheryl’s expertise in the interior design industry spans over 30 years. She has over 20 years of successfully decorating model homes to her credit, including 5 Parade of Homes. Being a licensed member of the Texas Association of Interior Designers, speaks to her integrity as a designer. Her focus is on new home construction and renovation, with a goal of helping each homeowner design and furnish a home that is personal to them. Cheryl is gifted at being a liaison between the homeowner, builder and subcontractors. She breaks the construction process into easy manageable stages and guides the homeowner through each stage from slab to furnishings. In her spare time, Cheryl loves spending time with her 6 grandchildren and watching football, especially high school and college.

Marcelle Johnson


Marcelle was a former Dave R. Williams Homes homeowner. Prior to joining this staff, she spent 17 years working at Frito-Lay, Inc. Her expertise lies in computer information systems, customer service, team building and leadership. She understands the customer's perspective in building a home as well as the business perspective and is able to help the first-time home buyer through the process. Outside of work, she stays busy with church activities as well as spending time with her children and grandchildren.


Cathy Watters

Project Coordinator

Cathy returns to Dave R. Williams Homes after several years managing a landscape business which she co-owned. She works hand in hand with Gary Castleberry, Vice President and General Manager, the entire construction team and our subcontractors to ensure each home is built to the client's specifications and the Dave R. Williams Homes standards. In her free time, she enjoys gourmet cooking and spending time with her daughter.


Eldon Carter

Construction Manager

Eldon is a local resident and has spent over 40 years in the home building business. He assists in all aspects of the home building process - working with clients as well as subcontractors. In 2016, Eldon received 2nd Runner Up Builder of the Year Award from the Town of Prosper. His pleasant, easy going personality makes him a real asset to the Dave R. Williams team!


Doug McClure

Construction Manager

Doug returns to the team after previously working for the company for 10 years. His 15 years of home building experience coupled with his diverse background and knowledge ranging from aerospace quality assurance to steel manufacturing enables him to bring value wherever he goes. His philosophy is to “inspect what you expect”! Welcome back, Doug!