Meet The Team


Mark D. Tiernan, DMD


Dr. Tiernan studied Zoology at DePauw University before pursuing his dental education at Oral Roberts University School of Dentistry. He completed additional training in forensic dentistry at the Armed Forces Institute in Baltimore, and has also added to his expertise through attending and teaching continuing education courses, including orthodontics, dental implants, Botox, Juvederm, Voluma, and Fast Braces. He is a member of:

• American Dental Association
• Oklahoma Dental Association
• Tulsa County Dental Society
• American Orthodontic Society

From an early age Dr. Tiernan was inspired by art. After he was noted in the local newspaper for winning a 2nd grade poster contest, his childhood dentist told him, “You should think about being a dentist. You have to be an artist to be a dentist.” This advice, alongside his positive dental experiences as a child, led him to decide then, in the 2nd grade, to one day pursue a dental career. Today, his passion is creating beautiful smiles.

At the office, Dr. Tiernan cares deeply about his patients. He instills in his team the motto: Love the People (or L.T.P.). He likes to think of his patients as his friends, and can often be found telling them stories and laughing with them throughout the day.

Dr. Tiernan and his wife of 37 years, Pam, have two daughters, both of whom work in the dental industry. Their elder daughter is a dental hygienist, and their younger daughter, Evangeline, works in Dr. Tiernan’s practice as the insurance coordinator. Outside the office, Dr. Tiernan loves going to church, working with cattle on his farm, refurbishing his family’s 100 year-old windmill, hunting, fishing, and relaxing on the land.

Sheana Goodman

Office Manager

Sheana has been an employee with Dr Tiernan’s office for almost 15 years. She is passionate about interacting with patients and making them smile with her positive attitude. She enjoys working with patients to make the best possible financial options to fit their budget.  Sheana graduated from Dr Carletti School of Dentistry in 2003 & continues her education by attending many continuing education seminars over the years. Her many certifications & training’s include:

  • Radiation Safety
  • Oklahoma Board of Dentistry Certification
  • CPR
  • OSHA
  • HIPAA
  • Care Credit Certified
  • Collections Law Certification
  • Human Resources Certification
  • Management & Supervisory Training
  • Sleep Apnea Medical Billing Certified

When Sheana is away from the office, She loves spending time with family and friends cooking out or playing bunco. Her favorite Sports include OU Football, The Oklahoma City Thunder, Dallas Cowboys and The Texas Rangers. She loves watching her nephew Jaycob play competitive baseball & her niece Haley cheer on the Sapulpa Little Chiefs. She also enjoys, cooking, traveling and preparing for her upcoming wedding next spring with her Fiance’ Todd.

Melissa Schultz

Front Office Manager

Melissa loves to try new things each and everyday especially of it can be challenging; which is why her passion is dentistry. She graduated from Community Care College for Dental Assisting. Her & her husband, Shane have 4 beautiful children, Jayden, Cooper, Journey and Jordynn Grace. When Melissa is away from the office she enjoys being outside, camping and fishing with her husband and spending time with her children.

Certified In:

  • CPR
  • Radiation Safety
  • Oklahoma Board of Dentistry Certified
  • OSHA
  • HIPPA

Tiana Fernandez

Registered Dental Hygienist

Tiana graduated from Fayetteville Tech. She attends regular continuing education throughout each year to add to her expertise as she wants to provide the best hygiene care for all her patients. When Tiana is away from work she enjoys spending time with her Husband, Alex of 9 years. They have a beautiful 5 month old daughter “Audrey” who has filled their life with such joy! Tiana & Alex also love animals as they have several dogs, one cat and two horses. Tiana loves riding horses, hiking, camping, going to the lake & enjoying the outdoors.

Certified In:

  • Local Anesthesia
  • OSHA
  • HIPPA
  • CPR
  • Radiation Safety

Whitney Biles

Registered Dental Hygienist

Whitney graduated from Tulsa Community College with her Dental Hygiene license. She was very eager to start work right away. Whitney is very passionate about interacting with patients and making them as comfortable as possible during their appointments

Certified In:

  • CPR
  • N2O
  • Local Anethesia
  • HIPPA
  • OSHA

When Whitney is away from work, She and her husband Cody, enjoy spending their time with friends and family and spending time at the lake. She also enjoys gardening.  You will most likely find Whitney and her husband outdoors whether it’s cold or hot.

Sarika Patel

Lead Dental Assistant/Patient Coordinator

Sarika graduated from Tulsa Community college with an associates degree, NSU with a bachelor of Science degree, and Tulsa Tech with a dental assistant school certification. She regulary stays up to date with continuing education courses.  Her Certifications and

Training’s include:

  • Oklahoma Board of Dentistry Certification
  • CPR
  • Radiation Safety
  • EMT Training’s
  • Coronal Polishing
  • OSHA
  • HIPAA

When Sarika is away from work she loves being at the gym working out and weight training. She’s also a pool/beach person who loves the sunshine and the outdoors. Sarika is an animal lover and loves to help rescue animals and find them good homes, she also has 3 beautiful sweet cats herself! She also enjoys spending quality time with her friends and family, including her nephew Mason and niece, Mia. Sarika also loves volunteering her dental assisting skills for military men and women events throughout the year.

Shelby Dentis

Dental Assistant

Shelby graduated from Charles Page High School in 2013 & attended Community Care college to further her education in Dental Assisting. Shelby joined Dr. Tiernan’s team in 2016. She is a proud Momma of her almost 3 year old little boy “Legend” and  very excited about another baby boy on the way , coming this November 2017. When Shelby isn’t at work she enjoys spending time with her family, friends, camping, fishing and being outside.

Certified In:

  • CPR
  • OSHA
  • HIPPA
  • Oklahoma Board of Dentistry Certified
  • Coronal Polishing
  • Radiation Safety

Karen Isham

Front Office Team

Karen loves making sure each patient has an excellent dental experience. She’s always putting a smile on everyone’s face. Karen has been in dentistry for over 35 years and loves it more everyday. Karen has been married to her wonderful husband, Tim for almost 36 years. Shea has 2 grown Children, 4 granddaughters and 2 grandsons and you cant forget the family dog, “Duke”. When Karen is away from work she enjoys spending time with her family and friends, following her grandson Caleb around with sports, shopping and spending time with her granddaughters. She and her husband also enjoy college sports and cooking together.

Certified In:

  • CPR
  • HIPAA
  • OSHA

Eugene Landon

INFORMATION TECHNOLOGY, DIGITAL SECURITY, MARKETING

Eugene graduated from the Rogers State University receiving his bachelor’s degree in Business Administration.  Upon graduation, he was accepted into the Master’s Program at the Oral Roberts University. He graduated top of his class with a Master’s of Business Administration degree specializing in Marketing Technology.

Eugene is responsible for all the computer networking at the office including protecting patients’ data from the unauthorized access and securing each and every computer, server, machinery from possible attacks. He fully complies with HIPPA laws and regulations including Microsoft Digital Security.
As a patient, you can rest assured that all of your personal information is encrypted, monitored and protected 24/7.

Outside of work, Eugene likes surfing, hiking, riding bikes, and visiting his family in California.

A Caring Environment

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