Set the line.
Raise the standard.
Exceptional general contracting services for those who expect more.
Proudly based in Atlanta
About Thirdline
All lines point to progress.
Expect More
Thirdline is a commercial construction company built for clients who expect more; from their contractor and their finished space. We bring clarity, consistency, and accountability to every project, balancing design intent with construction execution to create lasting value.
We’re focused, fast-moving, and highly engaged. We work as a true extension of your team, planning with precision, solving problems before they escalate, and delivering with discipline.
Whether leading a full renovation, delivering ground-up construction, or transforming tenant spaces, we build with purpose and performance in mind.
“Our approach blends the discipline of a large institutional contractor with the speed, accountability, and personal service of a high-performing local firm. We call it a ‘third way’ to deliver construction. One that closes the gap between owners and contractors, accelerates decision-making, and consistently delivers greater value.”
Our Values
We build with intention.
Every decision we make whether big or small is rooted in the bigger picture.
We ask why, we seek clarity, and we stay focused on what matters most to our clients, stakeholders, and end users.
We build as one team.
Owner, Architect, Contractor: when these voices are aligned, great things happen.
We prioritize clarity, trust, and shared goals from day one. Because building better starts with building together.
We follow through.
We’re builders at heart.
We set the line, sweat the details, and deliver what we promise. It’s not just about getting it done; it’s about doing it right and raising the standard.
We follow through with discipline and pride.
The Thirdline Process
Clear. Intentional. Aligned.
The Third Way is how we approach every project; with discipline, clarity, and purpose. It’s our proven process for how we align teams, build trust, and deliver environments that perform.
1. Discovery & Alignment
2. Informed Preconstruction
3. Thoughtful Planning
4. Focused Construction
5. Clean Closeout
6. Ongoing Partnership
Services
What we do.
From technically complex interior environments where compliance, sequencing, and systems coordination are key, to large-scale commercial, institutional, and mixed-use projects that shape communities and support growth.
• Office & Workplace
• Retail / Mixed-Use
• Education & Institutional
• Industrial
• New Construction
• Interior Renovation
• Adaptive Reuse
• Exterior Improvements
• Site Development
• General Contracting
• Design-Build
• Preconstruction
• Advisory
• CM at Risk
NEWS FEED
Where alignment leads.
Results follow.
The Third & Urban Connection
Better together.
Born from the vision of founder Frank Fotia together with Third & Urban’s development team, Thirdline was created to bridge the gap between Owner expectations and construction delivery.
Thirdline operates independently, while maintaining a strategic affiliation with Atlanta-based real estate firm Third & Urban. This relationship gives the firm unique insight into the development process and the ability to manage projects in ways that prioritize client goals.
Meet Frank
Founder and President Frank Fotia establishes Vision for Thirdline
Frank brings nearly two decades of experience leading construction teams across the Southeast. Before founding Thirdline, he served as Vice President at Leapley Construction and Project Executive at Balfour Beatty, where he delivered landmark projects for clients including The Coca-Cola Company, Industrious, Bank of America, and Asana Partners. A licensed Professional Engineer and Clemson graduate, Frank is known for his ability to blend strategy and execution; building teams rooted in trust, clarity, and accountability. Outside of work, he’s a husband, girl dad, and outdoorsman who believes the best projects, and lives, are built with purpose.
Meet Dan
Dan Szalecki brings technical expertise and a process-driven approach to Thirdline
Dan brings a strong technical foundation and hands-on experience managing complex projects. Before joining Thirdline, he delivered high profile projects across the mixed-use, higher education, corporate interiors and heavy civil sectors. His project profile includes Atlanta’s Spring Quarter, Cornell Tech site development, and Google’s Manhattan HQ.
A graduate of Virginia Tech with both bachelor’s and master’s degrees in Civil Engineering, Dan combines analytical precision with a builder’s mindset by driving projects forward with clarity, collaboration, and care for the details. Beyond construction, he’s energized by travel and time on a snowboard; always looking for new challenging terrain and new perspectives to bring to the table.
Meet Drew
Drew Merritt joins Thirdline as the glue between office and field
Drew Merritt is a Project Manager with extensive experience in ground-up, adaptive reuse, industrial tilt-wall, and interior construction across the Southeast. Notable projects include the Ponce City Market expansion; a 23-story hotel and four-story mass timber office building, as well as the Delta Baggage Handling System at Hartsfield-Jackson Atlanta International Airport.
A Newberry College graduate and former collegiate baseball player, Drew is known for his team-first leadership, craftsmanship, and calm under pressure. Outside of work, he enjoys spending time with his wife and daughter, playing golf, traveling, and being outdoors.
Meet Colby
Colby Mosshart joins Thirdline as Founding Superintendent
With more than a decade in the field, Colby brings a depth of hands-on leadership to every jobsite. His experience spans commercial interiors, hospitality, adaptive reuse, and ground-up projects across the Atlanta market. He most recently led single family home development in the field with DR Horton. Known for his precision, composure, and ability to lead crews through complex schedules, Colby sets the tone for how Thirdline builds; organized, safe, and relentlessly high-quality. Outside of work, he’s most at home outdoors with his family or working on personal projects that keep his builder’s instinct sharp. He sets the line as an ultra-runner.
780 North Highland
Select demolition is underway
Thirdline has been engaged to perform interior demolition at three existing parcels at 780 N Highland in the beloved Virginia Highlands neighborhood. Design for the future concept is in progress, and we’re excited to be part of the process.
Northridge Commons
Delivering Spec Suites and Tenant Improvements
Thirdline is currently performing several Spec Suite, tenant, and landlord improvement projects across the 7 building office/flex complex. We’re paving the way for future tenants to call NRC home.
Northbend
Preconstruction efforts are underway
Thirdline is performing preconstruction, planning, and scheduling efforts on the Phase 1 Infrastructure package. The former Corporate Square site in Brookhaven, Northbend is a master planned, mixed-use development across I-85 from the new Arthur M. Blank Hospital. The scope includes building demolition, site utilities, interior roads, and hardscape/landscape improvements.
![25'10-06 Northbend Master Plan[2] large](https://thirdlineconstruction.com/wp-content/uploads/2025/10/2510-06-Northbend-Master-Plan2-large-scaled.jpg)
Annual Retreat
Enjoying fellowship and camraderie in the North Georgia mountains
This summer, the Thirdline and Third & Urban teams came together in Dahlonega for a strategic planning retreat. We kicked off our second day with a sunrise “summit” of Blood Mountain, taking in the incredible North Georgia views and starting the day on the right note. Grateful for the camaraderie, great conversations, and a shared vision for what’s ahead.
GHCA Membership
Thirdline joins the Georgia Hispanic Contractor's Association
In recognition and support of our diverse workforce, Thirdline has chosen to become a member of GHCA.
Careers
Join Thirdline.
Work With Intention
Every decision we make starts with purpose.
At Thirdline, you’ll contribute to projects that matter, alongside people who stay focused on doing things right and delivering value that lasts.
Grow With Discipline & Pride
Careers are built the same way projects are: through alignment, dedication, and follow-through. With our team, you’ll sharpen your skills, take on challenges, and see the tangible results of your work every day.
Drop us a line.
Drop our team a note below.