Our People
Experienced Professionals. One Integrated Team.
Vestal Corporation brings together architects, engineers, and technical specialists who collaborate across disciplines and locations to deliver thoughtful, reliable solutions for complex facilities. Our people combine deep expertise with a shared commitment to quality, accountability, and long-term client success.
Leadership & Teams
Vestal’s leadership team brings diverse experience across architecture, engineering, and complex facility delivery. With expertise spanning the full project lifecycle, our leaders guide teams with a focus on collaboration, technical excellence, and delivering lasting value for our clients.
Executive Team
Discipline Team
Steve Slotten, P.E.
Senior Electrical Engineer - Electrical Engineering
Mary Weidenbenner, SHRM-SCP
Director - Human Resources
Chris Maniscalco, P.E.
Director - Civil Engineering
Kevin Riley, P.E.
Interim Director - Mechanical Building Systems
Igor Kano, P.E., S.E., PhD.
Director - Structural Engineering
Bill DeLong, P.E.
Director - Mechanical Process, Utilities, & Piping
Fernando Zabala, NCARB, AIA, CPD
Director - Architecture
Jeff Allen, P.E.
Director - Electrical Engineering
Michael Alberswerth, P.E.
Deputy Director - Structural Engineering
Ready to Work, Design, and Build Together?
Partner with Vestal to plan, design, and deliver complex facilities with confidence.

















