Meet Our Staff

Mark Keith - President, CEO

Mark Keith "I believe the success of business and life is to live by the promise; "Seek ye first the kingdom of God, and all these things shall be added unto you"

Mark grew up in Beaufort, SC, and was trained to be a third generation plumber with roots stretching back to his grandfather, who ran a service repair business in Pittsburgh. Mark worked his way through college at the University of South Carolina where he earned a Bachelor's of Science in Accounting. He worked as a field auditor for Ernst & Young upon graduation and then went on to become a Controller for a large, hazardous transportation company. In the early 90's, Mark's entrepreneurial spirit began to take over and he decided to combine his knowledge of plumbing and his experience in finance into a company with an ever-expanding vision for success. Through hard work and good stewardship, Horizon Inc. has become a major player in the national Multi-family industry. Mark continues to guide the company into new and larger markets and has plans to add an electrical division to the already thriving plumbing and HVAC company. He is a very hands-on owner and takes an active role in the monitoring of Horizon's projects.

Mark is the father of three adult children and resides with his wife, Gina, in Bluffton, SC. He is an avid golfer and enjoys sports from both the sideline and the court. He is an active church member but also loves to travel whenever possible.

Gina Keith - Vice President, COO

Email: gina@horizoninc.net

Gina Keith "I don't believe in limitations- personal or business. You can achieve anything if you are willing to work hard enough."

Gina was born in England on a U.S. Air Force base where her father was stationed. After her father retired in the early 1970's, she and her family moved to S.C. As a young child, she worked in the family's furniture business until she graduated from the University of South Carolina. Having bought and sold her first business venture at the age of 10, Gina has always been an entrepreneur at heart. She loves being part of Horizon Inc. and plays a major role in the company's inner dynamics. Gina and Mark have worked side-by-side since the company's inception, juggling the demands of a young family along with a growing business and her career as a high school mathematics teacher. As the company grew larger, Gina retired from teaching and joined Horizon fulltime in 2004 as Chief Operations Officer. Because of her father's background, Gina has a special connection with the Military Privatization housing projects that Horizon helps to build. It brings her real satisfaction to know that she has, in some small part, contributed to the wellbeing of our troops and their families. Along with Mark, she holds the belief that Horizon has only touched the surface of its potential and looks forward to watching the company grow in the future.

Gina feels one of her greatest accomplishments is being the mother of three wonderful children who are still a big part of her everyday life. She enjoys cooking gourmet meals alongside her two daughters and has a passion for art and design. She also volunteers as the head organizer for her church's social functions.

Tim O'Brien - Vice President, Business Development

Email: tim@horizoninc.net

Tim O'Brien "Short people rock!"

After 15 years in wholesale distribution, Tim joined Horizon in 2007 as the Purchasing Manager at our corporate office. His current responsibilities include developing Horizon's plumbing and HVAC multifamily businesses. Born in Newport, Rhode Island, Tim grew up in a military family and eventually settled in Summerville, SC. Tim is an alumnus of the University of South Carolina and holds a Bachelor's Degree in Business Administration.

Tim and his wife, Adria, have 3 young boys that keep them very busy. When he is not at a baseball park somewhere, he enjoys fishing and boating.