Driven By The Vision Of Our Founder, Dr. Paul Rizzo, Our Corporate Leadership is Responsible
For Our Overall Strategic Direction, And For The Promotion Of Client Satisfaction.

Rachelle Rizzo


Ms. Rachelle Rizzo is the President and CEO of RIZZO International, Inc. She has over 25 years of experience with Paul C. Rizzo Associates, Inc. prior to the ownership transition to RIZZO International, Inc. Her experience includes business development, administrative management, and human resource development for the company’s corporate headquarters, national and international branches. She is responsible for the strategic oversight, leadership, and vision to ensure the company has proper operational controls, management, and administrative procedures and policies in place to effectively grow the company.

Michael Edwards, P.E.


Mr. Michael Edwards, P.E., serves as the Chief Operating Officer for RIZZO. His duties include oversight of day-to-day operations, and supervision of sales and business development, project management and project execution, accounting, information systems, and quality assurance and quality control. Mr. Edwards engineering experience includes geotechnical analysis and design, nuclear power plant site characterization, forensic analysis, and hydroelectric power plant project siting and development.


Paul Rizzo, Ph.D., P.E.


Dr. Paul C. Rizzo, P.E., is RIZZO's founder and current Chief Technical Officer.  Dr. Rizzo has more than 50 years of experience in geotechnical and civil engineering, including dams and water resources, power generation, and infrastructure projects. He is a leading expert in the field of safety evaluations and seismic rehabilitation of dams, and in foundation engineering, structural engineering, and structural dynamics. He has also served on numerous technical panels, committees, and consulting boards charged with the deliberation of seismic hazard evaluation, seismic design basis, and soil-structure interaction. Dr. Rizzo has extensive engineering experience specifically related to hydroelectric and nuclear power plant structures; earth, rockfill, concrete, and roller compacted concrete dams; harbors and docks; and industrial facilities.

Mara McClain


Ms. Mara McClain is responsible for facilitating RIZZO’s development as a woman-owned business. In particular, Ms. McClain is responsible for identifying women's business enterprise resources and set-aside opportunities for RIZZO, and for engagement of the women's business enterprise network .

John Paul Giunta, P.E.


Mr. John Paul Giunta, P.E., is currently RIZZO’s Vice President of Finance and is responsible for the finance and accounting department.  His duties include day-to-day management related to all financial matters including reporting, insurance, budgeting, contract review, and financial systems.  Mr. Giunta has over 17 years of experience at RIZZO and has been involved in many roles in the company over his career.  Mr. Giunta is a registered Project Management Professional and has served as project manager for some of the largest and most complex projects completed by RIZZO.  Mr. Giunta's technical background is in civil and geotechnical engineering.

Daniel Barton, P.E.


Mr. Barton is RIZZO's chief civil engineer. Mr. Barton has more than 30 years of experience in civil, geotechnical, and environmental engineering, including design, licensing and permitting, and construction support for power generation facilities, water and wastewater infrastructure, industrial facilities, and institutional and commercial developments. His specific civil engineering expertise includes hydraulic analysis and design, stormwater management and design, and environmental evaluation. Mr. Barton has managed numerous infrastructure projects for RIZZO, including responsibility for scope, schedule, budget, and quality assurance and quality control.

Lynn Crilley


Bringing a unique perspective, Ms. Lynn Crilley had eight years of experience on the project side of business at RIZZO before becoming Director of Human Resources.  She has over 25 years of experience in senior administration, 8 years in Human Resources with 16 years directly in the engineering field.  Ms. Crilley is responsible for employee relations, recruiting and staffing, employee orientation and training, and employee services and advising.  She is also responsible for policy development and documentation, employment and compliance to regulatory concerns, compensation and benefits administration, and administration of programs, procedures, and guidelines to help align staff with the strategic goals of the Company.

Michael Mayer


Mr. Michael Mayer serves as RIZZO's Quality Assurance Director. He has more than 30 years of experience in the nuclear power industry and specifically 15 years in quality assurance. He brings a wealth of knowledge and understanding of the rigorous requirements that drive our Quality Assurance Program. Mr. Mayer is a Certified NQA-1 Lead Auditor.  Covering a range of subject areas, Mr. Mayer’s experience includes; reviewing management and organizational structures, evaluating nuclear programs, verifying compliance with federal, state and local laws and regulations. Representative audit areas include, but are not limited to: Security, Cyber Security, Design Control & Engineering Programs, ASME Section XI, Corrective Action, Fitness For Duty, Environmental Protection, Fire Protection, Emergency Preparedness, Radiological Protection, Process Controls and Chemistry, Materials & Procurement, and Maintenance.


Jay Copenhaver


Mr. Jay Copenhaver serves as RIZZO's Director of Information Technology. He has been providing strategic, cost-effective solutions in a senior management role for over 20 years. He has held positions as Chief Information Officer, Chief Technology Officer (International) and Director of Information Technology for three engineering based organizations. He was a member of a 6-person acquisition team (CEO, CFO, COO, CIO, CMO & CHRMO) performing due diligence analysis of companies' IT Infrastructure, software and ERP systems for eleven different companies, nine of which were acquired, and lead the IT team in merging or replacing systems after the acquisitions took place. At RIZZO, Mr. Copenhaver manages IT Infrastructure, Cyber Security, IT Policies, IT Staff and technology vendor relationships at all locations.