Our Team
Brannon Marcelline
Chief Executive Officer & Service Manager
Brannon Marcelline is the founder, Chief Executive Officer, and Service Manager of Maddox Mechanical Services. With decades of almost 20 years of experience in the commercial HVAC industry, he has built the company into a trusted mechanical contractor serving healthcare facilities, manufacturing plants, senior living communities, and other commercial clients throughout Georgia. Brannon was trained in Local 72 and the Mechanical Trade Institute as a skilled Journeyman and Chiller Mechanic Brannon brings a unique skill set and years of expert experience to the company. Brannon is responsible for overseeing company operations, field service, customer relationships, and technical excellence, ensuring every project is completed safely, efficiently, and to the highest industry standards. His hands-on leadership, commitment to quality workmanship, and dedication to exceptional customer service have established Maddox Mechanical Services as a reliable partner for complex commercial HVAC solutions.
Dianne Marcelline
Bookkeeper & Office Manager
Dianne Marcelline serves as the Bookkeeper and Office Manager for Maddox Mechanical Services, bringing more than 30 years of experience in bookkeeping, office administration, and small business financial management. She oversees the company's day-to-day administrative operations, including accounting support, payroll coordination, invoicing, accounts payable and receivable, and office organization. Dianne has a Master's Degree in business administration and uses her education and years of real world work experience to strengthen the systems and processes at Maddox Mechanical. Her attention to detail, financial accuracy, and commitment to operational efficiency provide the administrative foundation that allows Maddox Mechanical Services to deliver dependable service while supporting the company's continued growth.
Elizabeth Marcelline
Chief Financial Officer
Elizabeth Marcelline serves as the Chief Financial Officer of Maddox Mechanical Services, where she oversees the company's financial strategy, operational planning, contract administration, and business development initiatives. With a background in business management, real estate, and entrepreneurship, she brings a strategic approach to financial oversight, process improvement, and long-term growth. Elizabeth works closely with leadership to strengthen internal operations, manage financial performance, and support the company's continued expansion while maintaining the high standards of service and accountability that clients expect from Maddox Mechanical Services.
What Sets Us Apart
People-First Approach
Everything we do is built around understanding your needs and helping you succeed—because when you thrive, so do we.
Long-Term Relationships
We’re not just here for the now. We love creating lasting relationships with our clients and growing with them over time.
Proven Process, Flexible Execution
We bring structure where it counts and adaptability where it matters. Our methods are clear, but always responsive.