Our Team

Our company has grown to employ over forty experts. Below are profiles of some of our key personnel, including contact and branch info.

Mark W. Metzgar

Mark W. Metzgar, AAIA – CEO

Principal

Lehigh Valley Office

Mr. Metzgar serves as the corporation’s Chief Executive Officer and has been involved with building and site designs for over twenty years. His vast experience with a variety of corporate and private clients, lends a valuable resource to Cornerstone’s clientele.

John B. Anderson

John B. Anderson, P.E. – COO

Principal

Philadelphia Office

Mr. Anderson serves as the Chief Operational Officer and a active Professional Engineering Manager as a Principal Partner of Cornerstone. Mr. Anderson is responsible for the coordination, management and design of numerous multi-faceted projects, inclusive of commercial, residential and industrial developments. John’s 20 years of Engineering experience with project design and permitting are essential to the development of our client’s projects. His areas of expertise specifically lie in procurement of zoning, land development and building permit approvals; hydrologic modeling studies; flood studies; wastewater conveyance and treatment designs, DOT design and permitting; DEP NPDES and conservation district designs and all other aspects of design as required by Cornerstone’s clients.

Lester M. Stein

Lester M. Stein, AIA

Principal

Lehigh Valley Office

As a seasoned veteran of the design industry, Mr. Stein has been offering professional architectural services for over 40 years. Mr. Stein’s experiences offer the knowledge needed to serve Cornerstone’s diverse client base. Mr. Stein’s career in architecture has included multitudes of municipal and educational facility designs not to mention countless commercial and residential facilities.

Kevin H. Fruck

Kevin H. Fruck, P.E.

Professional Engineering Manager

Lehigh Valley Office

Mr. Fruck handles the management of the Lehigh Valley Office’s civil engineering department, thus providing excellent account / project management, plan review, expert hearing testimony, and extensive project design for a variety of residential, commercial and industrial projects in the Mid-Atlantic region. Types of projects range from program work to large scale, planned, residential and commercial lifestyle and retail centers, and include all aspects of Zoning, site plan and layout design, grading, storm-water management and utility design and construction plan preparation.

Stephen J. Romich

Stephen J. Romich, PLS

Professional Survey Manager

Lehigh Valley Office

Mr. Romich serves as a Professional Surveyor with years of field experience. He brings an energetic, and business oriented attitude to the profession. Steve’s role within the firm is to coordinate the survey teams for all offices to assure our clients are being served in a timely and efficient manner. His special attention to customer satisfaction and enjoyment of client interactions make him an essential part of the Cornerstone team.

Leslie A. Cunningham

Leslie A. Cunningham, PE

Professional Engineering Project Manager

Philadelphia Office

Ms. Cunningham serves as an engineering project manager. Ms. Cunningham has brought a level of excellence through her skills in the preparation of residential, commercial and industrial projects in the Mid-Atlantic region. She has provided services including excellent project management support, plan review, hearing testimony, zoning, site design, grading, storm-water management and utility design. Ms. Cunningham’s attention to detail and design practices have contributed to Cornerstone’s continued growth, development and client base.

Anthony T. Brunkan

Anthony T. Brunkan, PE

Professional Engineering Project Manager

Philadelphia Office

Mr. Brunkan serves as project management, civil engineering design, permitting and regulatory compliance in support of myriad development and re-development projects throughout the Mid-Atlantic region. His experience includes large and small scale commercial, residential and mixed-use development projects. Mr. Brunkan’s commitment to client’s goals in conjunction with his knowledge of all aspects of site development and design make him a valuable asset to any project team.

Richard J. Deskie

Richard J. Deskie, AIA, NCARB

Architectural Project Manager

Lehigh Valley Office

Mr. Deskie serves as the lead Architectural Manager out of Cornerstone’s Lehigh Valley Office. His responsibilities include but are not limited to coordination and management of office staff including architectural designers, drafters, in-house mechanical and structural engineers. His supervision encompasses all phases of design including concepts, preparation of construction documents and construction contract administration. In addition, his multiple registrations throughout the Eastern and Mid-Atlantic states allow the firm to provide design services for clients in multiple commercial building markets.

Jason Solano

Jason Solano

Senior Architectural Designer

Lehigh Valley Office

Mr. Solano has been involved in all phases of the design and construction process from the initial programing and conceptual stages of design though the successful completion of numerous projects. His project background includes a diverse selection of markets including residential, restaurant and hospitality, industrial, healthcare and institutional. His commitment to client satisfaction makes him a valuable member of the design team at Cornerstone Consulting.

Andrew Roth

Andrew Roth, RA

Architectural Project Manager

Lehigh Valley Office

Mr. Roth has experience in education, corporate, industrial, retail and health care building types and has been involved in phases of architectural services from initial programming, conceptual design, space planning studies, construction documents through construction administration to final inspections and close-out of projects. The scope of projects involves mall tenant improvements, corporate office space planning and renovations, to a large high school campus additions and renovations.

Megan L. Henry

Megan L. Henry

Architectural Designer

Lehigh Valley Office

As an Architectural Designer, Ms. Henry utilizes her design and teaching experience to assist clients in the development of projects from the initial concept phase through construction administration.  Ms. Henry’s diverse experience allows her to work independently, as well as lead others through the design process.  Ms. Henry has coordinated various projects types including residential design, tenant installations, and food service/ restaurant design.

Patricia L. Seyford

Patricia L. Seyford

Architectural Designer

Lehigh Valley Office

Ms. Seyford brings 35 years of experience in architecture, education, inspection and building code work. She currently holds ACI, NECEPT and NICET III certifications and is an Autodesk Certified Professional.

Ilya M. Peyros

Ilya M. Peyros, PE

Professional Engineering Manager

Lehigh Valley Office

Mr. Peyros serves the management of the Cornerstone Consulting Mechanical Engineering Department, where he oversees all aspects of HVAC Engineering and Design, providing project management, plan review and extensive project design for a variety of commercial, residential and industrial projects. This includes new construction as well as renovation and expansion of existing facilities.

Jeffery Magee

Jeffery Magee, PE

Professional Engineering Manager

Lehigh Valley Office

Mr. Magee serves as a Professional Engineering Manager, in charge of the structural engineering department of the Lehigh Valley Office. Specific duties include structural building analysis and design using various construction materials and applicable codes for a wide range of educational, commercial, industrial, institutional, and residential projects. As Project Manager, he supervises client meetings, determines project feasibility; design, develop and implement projects; supervise designers, draftsmen and engineers, prepare construction drawings and specification for projects, coordinate projects with clients and perform construction administration.

C. Jason Kupski

C. Jason Kupski, PM

Architectural Project Manager

Philadelphia Office

Mr. Kupski’s past experiences with the regional structural engineering division of one of the worlds leading concrete shoring companies provided him with an unparalleled understanding of client expectation & deadline management, not to mention technical ability. Additionally Mr. Kupski has developed an extensive restaurant design background assisting our franchise clients in layouts while maintaining a strong pension for daily operation and function. Mr. Kupski was one of Cornerstone’s initial employees, and through his hard work and dedication he is a manager that is paramount to our clients success in development.

Jason Steigerwalt

Jason Steigerwalt

Associate AIA

Philadelphia Office

Mr. Steigerwalt’s past experiences with food service design and tenant fit out coordination provides him with valuable skills necessary to facilitate project designs that meet client needs in an efficient manner. Mr. Steigerwalt’s attention to detail and understanding of the implications of design choices allow him to successfully manage and coordinate multiple disciplines within a project.

Christopher Deans

Christopher Deans

Sr. Architectural Designer / 3D Rendering

Philadelphia Office

Mr. Deans serves as our lead 3D designer and graphics coordinator. He is responsible for creating aesthetic options for our design presentations. He prepares compelling photo realistic 3D renderings, photo composites, and animation for a wide rage of our clients.

Jena Diefenderfer

Jena L. Diefenderfer

Office Manager

Lehigh Valley Office

Ms. Diefenderfer serves as our Human Resource and Payroll Manager. She is responsible for employee relations, implementing and maintaining policies and procedures as well as all aspects of financial transactions. Her degree in business management and commitment to complete discretion in all scenarios allows her to successfully manage the entire administrative staff.