WHO WE ARE
PROFESSIONAL QUALIFICATIONS
Seal Engineering, Inc.’s professional staff consists of civil and structural engineers. Professional engineers are registered to practice in the Commonwealth of Virginia, Maryland, the District of Columbia, and West Virginia. All staff engineers are trained, experienced and licensed to operate laboratory and nondestructive materials testing equipment.
SPECIALIZED EXPERIENCE
We pride ourselves on careful and thorough investigations and reports. Our recommendations and designs emphasize maintenance and repair whenever possible to maximize the service life of the building envelope. We recommend replacement only when it is clearly the most practical and economical alternative. Our engineering services have proven successful in the bidding process, where our sound, clear and practical designs and bid packages have obtained truly competitive bids. For special assistance beyond our capabilities, we work closely with several architectural and engineering firms, materials consultants and testing laboratories.
QUALITY CONTROL/ ASSURANCE
Our rigorous internal quality control/assurance program ensures coordinated and technically accurate reports, plans, designs, specifications and construction cost estimates. Work performed by our engineering designers and consultants is carefully reviewed by our Quality Control Principal, David DiQuollo.
PRINCIPALS
David A. Fyffe, PE, BECxA
Education:
- Bachelor of Science, Civil Engineering, 1984
- Clarkson University, Potsdam, New York
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Registrations:
- 1992/Civil Engineering PE ‑ VA #024165
- 1992/Civil Engineering PE – DC #907371
- 2005/Civil Engineering PE ‑ MD #31665
- 2005/Civil Engineering PE – WV #16421
Experience:
Mr. Fyffe is familiar with a wide variety of building envelope systems and components, and has provided services for federal, state and local clients in the Washington, DC Metro area. Many of the projects executed by Dave have been on occupied structures of historic importance, a factor that was carefully considered in the repair and replacement design programs implemented. He is responsible for creating and reviewing evaluation reports, cost estimates, design drawings, plans, specifications, bid packages, contract documents, and observation reports. In addition, he serves as a personnel manager for the company; overseeing the allocation of resources to ensure capacity to meet contract commitments.
David J. DiQuollo, PE
Education:
- Bachelor of Science, Civil Engineering, 1987
- Virginia Polytechnic Institute & State University, Blacksburg, Virginia
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Registrations:
- 1992/Civil Engineering PE ‑ VA #0402022871
- 2016/Civil Engineering – PE MD #50198
- 2016/Civil Engineering – PE DC #908837
Experience:
Mr. DiQuollo is familiar with a wide variety of building envelope systems and components, and has conducted field investigations for federal, state and local government agencies, school systems, universities, commercial owners, churches and condominium associations. He serves as a quality control principal and oversees functions of project managers and engineers. He is responsible for managing, reviewing and preparing evaluation reports, cost estimates, design drawings, plans and specifications, with a particular emphasis on programmed maintenance, repair and replacement. David serves as QA/QC for the company.
Lisa DiGiulio
Business Manager
MICHAEL HARRIS
Project Engineer
Charles F. Taylor, P.E.
Project Engineer
David Krekelberg, EIT
Project Engineer
Summer Ellis
Project Engineer
Aidan K. Rockwood
Jr. Engineer
William A. Berry, IV
Technician
PROFESSIONAL MEMBERSHIPS AND SPECIALIZED TRAINING

Member, Air Barrier Association of America

Member, American Society of Civil Engineers

Member, American Society of Testing and Materials

Member, Construction Specifications Institute

Member, Association for Preservation Technology

Member, American Concrete Institute

Member, International Concrete Repair Institute

Member, National Roofing Contractors Association

Member, National Trust for Historic Preservation

Member, Roof Consultants Institute


Certified Nuclear
Moisture Meter
Operators (All Engineers)