Our companyABOUT Site Engineering

Site Engineering Inc, founded in 1983, has successfully completed over 1000 challenging and routine jobs over the years. We value our workforce who makes this possible and believe that our field personnel are integral to the success of the company.  We are proud to maintain a workplace that emphasizes safety first and cooperation between management, project personnel and owner representatives.

Utility Contractor License No UC 300075

General Contractor License No GCCO 003235

GA DOT Certification NO 251640

Construction QualitySAFETY PROGRAM

Site Engineering Inc. promotes and maintains an OSHA compliant Safety Program that is administered by our OSHA Certified Trainer.  We are able to provide in-house and site specific safety training so all our employees maintain current certifications.  Additionally, we are able to provide this service to others including our subcontractors and partners as needed. 


Paxton Billingsley, P.E.


Paxton joined SEI full-time in 2002. He currently leads an experienced SEI team and maintains the company's reputation for quality work and client satisfaction. He is responsible for active oversight of all company operations including estimating and contract negotiation, financial reporting and banking, and satisfactory project completion.

J. David Hess, P.E.

Vice President

David joined SEI in March 1997. He is currently responsible for the overall allocation of personnel and equipment resources for all company projects. Additionally, he continues to manage select key projects and provides oversight and advice for the project management team.

Dwight A. Voyles

Vice President, Estimating

Dwight joined SEI in 1994 and served as president from 2014 to 2019. He is currently the chief estimator and is involved with scheduling and management on key projects.

J. Carter Hewitt

Project Manager

Carter joined Site Engineering in 2016. He is currently a Project Manager responsible for daily management of several million dollars of work in process. He strives to maintain an excellent relationship with our clients and supports our field personnel in order to maintain efficient, safe and clean jobsites that maximize production and ensure satisfaction upon project completion.

Tamara L. Isbell

In House OSHA Approved Trainer

Tamara joined SEI in February 2016 as an Administrative Assistant in Estimating. In 2020, after completing the required OHSA training she became the company's Safety Officer. She currently coordinates Site's Safety Program providing in-house certification training and promoting jobsite OSHA compliance.

Diane Bonilla


Diane joined Site Engineering in December 2000. She currently is Human Resource and Payroll Manager and actively interacts with all employees to promote a collaborative and rewarding work environment.

Alex Gonzalez M.S.P.M

Assistant Project Manager

Alex joined Site Engineering Inc in 2021. He is currently an Assistant Project Manager, responsible include assisting the Project Managers with daily task. Along with maintaining an excellent relationship with our clients and supporting our field personnel in order to maintain efficient, safe, and clean jobsites.

Elizabeth Billingsley

Board Member at Large

Elizabeth co-founded Site Engineering Inc. in 1983 and served as Chief Financial Officer until 2020. She currently assists management with financial reporting and special projects.

Byron Billingsley P.E. Retired

Chairman of the Board

Byron is the founder of SEI and served as president from 1983 to 2014. He acts as an advisor and consultant to current management.