Carl Locke, Sr.


Carl "Ed" Locke, Jr.


Jennifer Hall

Vice President

Mac McMillen

Operations Manager
As a privately held, locally, and family-owned construction firm, SEMCO has been serving Polk County and Central Florida in the Commercial, Industrial and Institutional markets almost 40 years completing over 7,000 major projects. SEMCO brings to every project a highly qualified, significantly experienced, well trained, and exceptional team of construction professionals.

Our construction management team members have an average of over 25 years of industry-leading experience as you will see in the "Meet the Team" and projects area of the website.

Complementing our quality employees is SEMCO’s development of sound relationships with over 300 subcontractors and 450 suppliers who provide the highest quality work and materials at valued pricing for all phases of construction. Since our founding in 1975, our firm has established a respected reputation solidified by a construction philosophy of traditional foundation and