Lake Garner, DMD
Chief Executive Officer

Dr. Lake Garner has been practicing dentistry since 1996. He is a lifelong Mississippi resident and has been married to his wife, Michelle, for over 20 years. They have three children, and are very active in the Hattiesburg community and local charities, including the Pink Ribbon Fund and the Hub City Humane Society. Dr. Garner and Michelle were participants on Season 9 of The Amazing Race. 

Dr. Garner attended the University of Mississippi Medical Center School of Dentistry. Before dental school, he completed his undergraduate education at the University of Southern Mississippi in 1992. He is an active member of the American Dental Association and Mississippi Dental Association. In addition to overseeing company business and practicing dentistry full-time, Dr. Garner also owns commercial properties. 

Lanthea Mangum, RDH
Chief Operations Officer

Lanthea Magum, a registered dental hygienist, began her career with Dr. Garner in 2004. Originally hired as a dental hygienist, she has acquired several promotions as she aided in the growth of the company from the establishment of the first clinic. 

After being promoted to the Corporate office in 2016, Lanthea created the company's first ordering system and managed all dental supplies. Lanthea now oversees all operations, including project management of new offices, sustainability of clinic staff and equipment, and the overall functionality and growth of Garner Dental Group. 

Lanthea and her husband Mike are from Hattiesburg and have two children. 

Sharley Hamm
Chief Marketing Officer

Sharley Hamm began as the Marketing Director for Garner Dental Group in 2016. She holds a Bachelor of Arts in Journalism, with an emphasis in Public Relations, and a Master of Science in Mass Communication from the University of Southern Mississippi.

Sharley implements all internal and external marketing campaigns, manages website development and digital advertising, and organizes company events. In addition to promoting Garner Dental Group, Sharley also handles all MDOT permitting and sales of Billboard Man, a division of Garner Properties. 

In her free time, Sharley can be found at Southern Cross Animal Rescue (SCAR), where she serves as a board member. Sharley is an alumna of Phi Mu Sorority. She is a co-director of the Miss Jasper and Jones County Hospitality pageants and is a member of the Mississippi Association of Pageant Judges.

Brittiney Lindsey
Purchasing and Supply Manager

Brittiney Lindsey has experience in dental assisting and dental supply ordering since 2007. Originally hired in 2009 as a dental assistant, she now manages all office and dental supply purchasing for Garner Dental Group.

Brittiney completed the Dental Assisting Program at Pearl River Community College in 2007, with certifications in Infection Control, Radiology, and CPR. During her time at PRCC, Brittiney was a student member of the American Dental Association, was awarded with an academic achievement award, and graduated with special honors. 

A Hattiesburg native, Brittiney has two daughters. 



Nena Williamson
Regional Manager

Nena Williamson is a seasoned dental professional with years of experience at all levels. Beginning as a dental assistant, she eventually worked as a hygienist and then oversaw operations as an office manager. She is knowledgeable in the daily operations, as well as insurance and accounts receivable. 

Nena's expertise makes her valuable in her current role, as she is able to relate to the office staff. She offers support to office managers and front staff, as well as aids the Corporate office in the accumulation and integration of new clinics. 

Nena, a Sumrall, MS native, is a licensed realtor and handles several rental properties. In her free time, she enjoys traveling and spending time with her twin grandchildren. 

Mary Halterman
Regional Manager

Mary has been employed with Dr. Garner since 2016. Initially hired as a receptionist, Mary quickly decided that she wanted to learn as much as possible about the processes and responsibilities that are overseen by front office staff. In 2018, she began working with our Corporate office to provide support to office managers.

Mary believes that any workplace improves and benefits the most when employees are open to change and are willing to learn. She is glad to be a part of teaching and implementing appropriate and effective procedures in our offices. 

Mary is from northeast Louisiana, and still resides there. She and her husband, Ashley, have been married since 2012 and have two beautiful children, Colby and Mallory. When she is not working, Mary can be found spending time with her family, reading, or baking. 

Lindsey Singelmann
Regional Manager
Katie Michinni, RDH
Hygiene Director

Katie Michini, a Mississippi State Board Registered Dental Hygienist, began her career with Garner Dental Group in 2016 at our Gautier location. In 2018, she was promoted to her current position in which she provides support and mentors to all location's hygienists. Katie ensures production goals are being met, analyzes reports, and  evaluates hygienists' skills. 

Katie graduated from Pearl River Community College with an Associate's Degree in Applied Science and has been practicing dental hygiene for 10 years. 

Katie and her husband, Monte, have been married 13 years. They have three children: Gracee, Regee, and Jerzee. 

Kelly Miller
Credentialing Specialist

Kelly Miller has extensive knowledge in management and over 20 years of experience in the dental field. Kelly's knowledge has landed her the position of Credentialing Specialist and is in charge of obtaining, verifying, assessing credentials for dental providers, and processing credentialing and re-credentialing applications. Kelly also handled accounts receivable for multiple clinics. Her experience in the dental field is a great asset to Garner Dental Group.

Kelly and her husband, Kenneth, reside in Petal, MS. They have two sons, Kendall (Bethany; Sarahgrace, Kayden) and Kelton (Kristen; Kreed, Krewe, Karlisle). Kelly enjoys spending time with her family, being outdoors,  and shopping. 



Mikey Mims
IT Manager

Mikey Mims began his employment with Garner Dental Group in May 2018. He has been working in the Information Technology field since 2010, and has several years of experience using his skills with other health related companies. 

Mikey's duties within the IT Department include installing, configuring, and troubleshooting all hardware and software related issues throughout the company. 

Quincy St. Pierre
IT Assistant

Quincy joined Garner Dental Group in 2020. He is a University of Southern Mississippi graduate, earning a Bachelor of Arts in History, with a minor in Classics. 

Quincy is also a member of the Knights of Columbus. 

Wyatt West
Multi-Media Specialist

Wyatt West, a native of Jackson, Mississippi, attended The University of Mississippi. He started his career in print design. Wyatt joined Garner Dental Group in the summer of 2021, where he handles web development, digital advertising, and printing needs.

Jordan Funchess
Administrator Assistant

Jordan is from Jackson, Mississippi. She attends The University of Southern Mississippi where she is studying Child and Family Sciences with an emphasis in Family Relations. She has been working with the corporate office since 2021. She serves as the administrative assistant for the corporate team and all offices.