Corporate Overview

Over the course of nearly 35 years, RIZZO has grown from a small, 6-person office to a large corporate headquarters with regional (United States) and international representation. Our qualified staff of technical and design professionals, most with advanced engineering or geoscience degrees and corresponding professional licenses, collectively work to support projects coordinated from our corporate headquarters, but also service clients and markets specific to our regional representatives and our key collaborators.

Company Background

RIZZO International, Inc. began business on November 1, 2017, following an ownership transition of RIZZO Associates, Inc. from original founder and primary shareholder, Dr. Paul C. Rizzo, to the new leadership and direction of RIZZO International, Inc. president, Ms. Rachelle Rizzo, MBA.

Ms. Rizzo brings over 25 years of leadership experience and a strong background in engineering consulting to RIZZO International, Inc. with her previous management leadership role in RIZZO Associates, Inc. Ms. Rizzo, along with her corporate leadership team, has set the course and direction for RIZZO International, Inc. to continue great engineering traditions while focusing on innovation and technological advances of today and the near future.

The team of world renowned engineers working for RIZZO Associates, along with the administrative staff, transitioned directly to RIZZO International. RIZZO Associates, Inc., our predecessor firm, was founded by Dr. Rizzo in 1984.

Women's Business Enterprise Certification

With direct ownership of RIZZO International, Inc. by Ms. Rachelle Rizzo and as part of our business transition from RIZZO Associates, Inc., our firm became certified as a Women’s Business Enterprise (WBE) by the Women’s Business Enterprise National Council, the nation’s largest third-party certifier of businesses owned and operated by women. Ms. Mara McClain, director of Women’s Business Enterprise Development, has spearheaded this rigorous process and brought about this prestigious certification for RIZZO International, Inc. With this designation, our engineering expertise and experience can now also aid clients in meeting diversity goals for public works projects.

Our Global Experience

RIZZO’s engineers and geoscientists have been involved in major power generation and large civil infrastructure projects in the United States, South America, Europe, the Middle East, Africa, Australia, and Asia. Our international efforts are in part facilitated by a diverse staff of fluent speakers of nearly 15 languages, including Arabic, Hindi, Mandarin, Russian, Spanish, Turkish, and Ukrainian.

Quality Assurance

Our integrated quality management system is certified under International Organization for Standardization (ISO) 9001:2015 standards for the provision of professional engineering and consulting services, and compliant to ISO 14001:2015 criteria for environmental management systems. Our quality management system has also been approved per the Nuclear Procurement Issues Corporation's joint audit program, and meets the requirements of Appendix B to Part 50 of Title 10 of the Code of Federal Regulations,  and the American Society of Mechanical Engineers' Nuclear Quality Assurance (NQA-1) Certification Program.

Our Locations

RIZZO International, Inc. Offices


500 Penn Center Boulevard
Suite 100
Pittsburgh, PA 15235

Ms. Tara Kirkman



3538 Peoria Street
Suite 511
Aurora, CO 80010

Mr. Chase Velarde



Mr. Grady Adkins, P.E.



Mr. Michael Cline, P.G.


Collaborative Representation


580 White Plains Road

Suite 425
Tarrytown, NY 10591

Mr. Diego Rivera, P.E.

914-332-0037 x403


Mr. Marek Tengler



Dr. Viktor Kostarev




Mr. Derek Lee




Dr. Melissa Dubinsky


Most of our technical staff are located in our corporate headquarters in Pittsburgh, Pennsylvania, or our Denver, Colorado engineering, testing, and inspection branch office. However, we also maintain staff in the southeastern and southwestern United States, and have collaborative relationships with firms and individuals in New York and abroad.

© 2020 RIZZO International, Inc.

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