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About - Structure Tone
Structure Tone is a global leader in construction management and general contracting services with offices located in the US, UK, and Ireland. Founded in 1971, the company is among the world’s top twenty construction companies worldwide, responsible for more than $3.5B in annual construction volume.
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Founded in 1929, LF Driscoll has earned our reputation as a construction management leader in the Mid-Atlantic. The collective talent and expertise of our people, clients, and partners have resulted in hundreds of buildings that pioneer research, advance medical treatment, and patient care, showcase art and entertainment, preserve cultural treasures, and educate generations.

Leon F. Driscoll started LF Driscoll under the cloud of the Great Depression, a time when reputation was paramount, and perseverance was the only lasting measurement of success. Our company built this reputation through old-fashioned hard work and dedication, which remain at our core today.

Relationships are the foundation of our business
More than 85% of our work is from repeat clients—our clients count on us to deliver projects on-time and within budget. Our development and design associates know when they ask us questions, our answers are realistic and bring value. Respect for the skills and dedication of our subcontractors influences everything we do. As a result, the trust and collaboration we build with all of these partners are paramount to our success.

Top-tier construction management
Lean construction centers on teamwork and innovation as our executives, project managers, superintendents, estimators, purchasers, schedulers, engineers, architects, and virtual design & construction specialists work together. The result? Maximum value for clients through realized design for architecture and engineering partners, speed to market, cost accuracy, and safer work environments for tradespeople.

Decades of experience and leading-edge perspectives
We were managing the construction of multi-million-dollar buildings before universities even offered degrees in construction management. With decades of in-field experience—coupled with professional degrees in a variety of concentrations, from construction management, engineering, and architecture to business disciplines—our team offers top-of-class bench strength.

Diverse teams build better projects
Great ideas come from everywhere and everyone. There are no limits to what we can accomplish when we engage and empower diverse teams to employ forward-thinking construction practices and deliver excellence every day.

Safety is our core value and moral obligation
We are deeply committed to ensuring that every person who works on or visits our project sites returns home safely every single day. In support of our dedication to safety, we developed Safety 360°—a revolutionary behavioral safety program that is the new driving force in raising construction industry safety standards by instilling an inherent and consistent culture of safety awareness in employees, tradespeople, and project stakeholders.


Times named CM of the Year by Subcontractors Association of Delaware Valley (SADV)
Ranked Builder in Philadelphia region (Philadelphia Business Journal)

Featured Projects

  • The Barnes Foundation,
    Philadelphia, PA
    Barnes exterior by Tom Crane
  • Penn Medicine Pavilion,
    Philadelphia, PA
  • Comcast Center,
    Philadelphia, PA
    Comcast Center, Philadelphia
  • Comcast Technology Center,
    Philadelphia, PA
    DBOX for Foster + Partners - Arch Street - Comcast Entrance
  • CHOP Roberts Center for Pediatric Research
    Philadelphia, PA
  • The Church of Jesus Christ of Latter-day Saints Meetinghouse,
    Philadelphia, PA
    building outside view

Our Leaders

Frank (Mack) Stulb


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Michael Delaney

Executive Vice President

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Kenneth Innella

Vice President

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John DeFazio

Vice President

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Troy Addis

Vice President

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Contact Us

LF Driscoll

401 E City Avenue,
Suite 500
Bala Cynwyd, PA 19004
Tel: 610.668.0950
Tel US: +001.610.668.0950
Fax: 610.668.8423