Let’s Get to Know Each Other

John Ververelli

John C. Barton, PE

Vice President, Principal

Pennsylvania State University, Bachelor of Science, Electrical Engineering1992

John Barton is responsible for overseeing all electrical engineering services in the areas of commercial, retail, medical, education, historical renovation, public spaces, theatre, and industrial projects for Dimitri J. Ververelli, Inc., Consulting Engineers.

Specifically, Mr. Barton has been responsible for the design of central data processing centers, medium and low voltage distribution systems, substations, lighting and controls, energy management systems, security and fire alarm systems, and lightning protection.  In addition, John has extensive experience in multi-building office and research complexes, high rise buildings, emergency power, and central plant utilities.

Mr. Barton develops each project design concept to ensure the engineering elements of the project are integrated with the building architecture while upholding rigorous energy conservation and performance standards.

With over two decades of engineering expertise, Nick is a seasoned professional specializing in HVAC, plumbing, and fire protection engineering. His career spans multiple sectors including higher education, corporate, government, science and technology, and municipal projects. Known for his strategic leadership and technical depth, he has spent more than 10 years managing complex infrastructure initiatives, primarily in the higher education sector.

John A. Ververelli, PE

President, Principal-in-Charge

Drexel University, Bachelor of Science, Mechanical Engineering, 1978

John has over 45 years of experience in the engineering and design of heating, ventilating and air-conditioning systems, and energy management systems and oversees all engineering services.  He has been with the firm since 1982.

John has extensive experience in the design of central chilled water plants, life cycle cost analysis, and building automation systems. John is able to manage a variety of building and industrial projects with a strong foundation and hands on experience in facilities design, construction planning, cost estimating and scheduling. John believes that well thought out and thorough planning of capital projects are the root of successful comprehensive ventures. 

Nicholas P. Haas, Jr., PE, CBCP, CEM

Vice President, Principal

Drexel University, Bachelor of Science, Mechanical Engineering, 2008
Drexel University, Master of Science, Engineering Management, 2016

  • LOM

    Linda O. Miedwig

    Project Manager
    Mechanical/Electrical Engineering

  • JRL

    John R. Lehman

    Project Manager
    Mechanical Engineering

  • JL

    Jennifer Leone

    Project Manager
    Mechanical Engineering

  • NVD

    Niki V. Diamond

    Director of Business Development
    Chief of Staff

  • TS

    Thomas Stevenson

    Technical Designer
    Drafting

  • SM

    Stefanie McClung

    Office
    Administration

  • TJL

    Tyler Leone

    Engineering Intern
    Mechanical

  • DWG

    David W. Gilbert

    Mechanical Engineering
    Project Manager