The Centerline Team
Mark Green
Founder & President
Mark brought many years of construction industry experience to the company when he started it in 1983. His first company was Rockwall Contracting, a residential drywall subcontractor established in 1974. Seeking to expand his experience into the commercial sector, three years later he closed Rockwall and took a position as a commercial Jobsite Foreman for the Sweeny Company and then later as an Estimator/Project Manager for O’Meara Construction. Mark stays closely involved with Centerline operations, handles the bidding process and oversees all estimates. Outside of the office, he enjoys sailing, hiking, martial arts practice and family activities.
George Toboll
Vice President
George has over 40 years of experience in the building trades and has been with Centerline Construction since 1983. He handles daily operations with the field operations and project management. George enjoys working on large projects, time with family and the outdoors.
Tim Streett
Chief Estimator/ Vice President
Tim came to Centerline in 1997. Prior to that he worked for Streett Contracting as a Drywall Mechanic, Foreman, Estimator. He has 29 years experience in the Commercial Drywall Industry. Tim handles pre-construction budgeting, competitive and negotiated bids, value engineering, material pricing and purchasing. Outside of work, he enjoys spending time with his family and watching Baltimore Ravens football.
Kazibi Gildenhuys
Project Manager/ Vice President
Kazibi learned basic carpentry and building construction while growing up on a working dairy farm outside Mossel Bay, South Africa. He joined Centerline in the Spring of 2013 after graduating with a BComm Logistics degree from Stellenbosch University. As a Project Manager he oversees numerous projects within the Mid-Atlantic area. His logistical background helps him gauge the channels between general contractors, suppliers and customers.
Karl Toboll
Project Manager/Vice President
Karl has been employed by Centerline since 1993. He started working for the company during the summers as a teenager and moved into full time in 1996. Since then he worked his way up through the ranks from a laborer and took his current position as a Project Manager in 2005. He is married and a father of three. In his spare time Karl enjoys fishing, camping and relaxing with his family.
Everardo (Eddie) Estrada
Project Manager
Eddie started at Centerline in 2000, as a summer laborer while in high school. He became a full-time employee in 2002. In 2017, he transitioned from a field role to project manager and is currently the company’s Field Manager. Outside of work, Everardo enjoys watching sports and spending time with his family and friends, and his dog, Coco.
Craig Runge
Project Manager
Craig started at Centerline in 1995 as an EIFS Mechanic, with experience in plastering and drywall finishing. He was soon put in charge of exterior stucco projects and then took on the role of a partition layout person. He later became a Drywall Construction Foreman and then a Project Manager.
Richard (Wayne) Steinbach
Warehouse Manager/DOT Truck Driver
Wayne has been with Centerline since 1990. He started in the role of DOT Truck Driver. He still drives for the company but is now also the Warehouse Manager. Outside of work, he enjoys building complex Lego models.
Nicole Mings
Controller/Treasurer
Nicole started at Centerline in 2014 as an Administrative Assistant. In 2023 she was promoted to the position of Controller and Secretary/Treasurer of the corporation. Nicole has three children, a granddaughter, and several pets. In her spare time, Nicole can be found crocheting or working on her novel.
Renee Ruffin
Administrative Assistant
Renee started with Centerline in October of 2023 as an Administrative Assistant. Outside of work, Renee enjoys spending time with friends, but especially family time with her husband, daughter, and grandson.