The Corona Team
Our Leadership
Louisville, CO
Dr. Chad Seidel is the President of Corona. He has enjoyed working with the water sector for nearly two decades providing innovative solutions to water quality and treatment challenges across the country.
Office: 303-544-2161 X 123
Chad Seidel, Ph.D., P.E.
President
Rockland, MA
Mr. Ergul is the Vice President of Corona. Ayhan brings nearly two decades of experience delivering information technology solutions in an environmental context to clients at municipal, state and federal level.
Office:781-753-6666 X 404
Ayhan Ergul
Vice President
Rockland, MA
Mr. Rosen is the CEO of Corona. Jeff provides expertise in research, information management, data analysis, and statistics to support environmental decision making and resource management.
Office: 781-753-6666 X 654
Jeffrey Rosen
Chief Executive Officer
Water Quality and Engineering Team
Louisville, CO
Craig has over 15 years of experience as a consulting engineer specializing in advanced water treatment and bench and pilot scale testing.
303-544-2161 X 403
Craig Gorman, P.E.
Sr. Water Process Engineer
Fremont, CA
Tarrah is a water process scientist with over 14 years of experience solving drinking water contaminant and regulatory compliance challenges.
781-753-6666 X 666
Tarrah Henrie
Sr. Environmental Scientist
Louisville, CO
Chris has over 15 years of professional engineering experience in advanced water treatment processes and distribution system water quality.
303-544-2161 X 451
Chris Corwin, Ph.D., P.E.
Sr. Water Process Engineer
Gonzales, LA
Jake is a professional engineering with more that 15 years of combined experience in the process engineering and permitting and compliance assistance.
781-753-6666 X 117
Jake Causey, P.E.
Sr. Water Process Engineer
Lewisville, TX
Amlan has over 17 years of experience as a consulting engineer specializing in advanced water treatment, distribution system water quality, and pilot scale testing.
781-753-6666 X 421
Amlan Ghosh, Ph.D., P.E.
Sr. Water Process Engineer
Louisville, CO
Carleigh is a Ph.D. with experience focused on source water quality, water treatment process engineering, disinfection by-product formation and statistical modeling.
303-544-2161 X 412
Carleigh Samson, Ph.D.
Water Process Engineer
Philadelphia, PA
Sheldon has over 10 years of experience conducting applied research and consulting focused on water treatment and distribution system water quality.
781-753-6666 X 416
Sheldon Masters, Ph.D.
Environmental Engineer
Louisville, CO
Sierra has an MS in Environmental Engineering and has experience in water quality analysis, water treatment pilot operation, data analysis and process design.
303-544-2161 X 449
Sierra Johnson
Water Process Engineer
Louisville, CO
Brittany has a MASc in Civil and Resource Engineering and has experience in water quality analysis, water treatment pilot operation, data analysis and process design.
303-544-2161 X 423
Brittany Gregory
Water Process Engineer
Louisville, CO
Nathan has a MS in Environmental Engineering from the University of Colorado and has experience in treatment process design and water quality management.
303-731-3649
Nathan MacArthur
Water Process Engineer
Water Sector Economics, Planning, Management & Communications
Louisville, CO
Janet has more than 15 years of experience in water resource planning & economics, specializing in integrated resource management and economic impact analysis.
303-544-2161 X 446
Janet Clements
Water Sector Economics Director
Louisville, CO
Jim has more than 20 years of experience as a natural resource economist specializing in long-range integrated planning, economic analysis, and asset management.
303-544-2161 X 445
Jim Henderson
Senior Economist
Louisville, CO
Shonnie has over 18 years of experience in utility management specializing in customer communication and stakeholder collaboration.
303-544-2161 X 217
Shonnie Cline
Management &
Communications Strategist
Louisville, CO
Claire has a Master’s Degree in Natural Resource Economics from Colorado State University and brings experience in applied research, reporting and data analytics.
303-544-2161 x 447
Claire Sheridan
Economist
Source Water Management
Rockland, MA
Margaret manages the water resource team, supporting source water protection, software development, decision tools, regulatory analysis and GIS efforts.
781-753-6666 X 414
Margaret Kearns
Sr. Environmental Scientist
Rockland, MA
Jennifer provides data management and analytical support, training, and outreach materials to support water utility source water protection programs.
781-753-6666 X 419
Jennifer Benjamin
Data Analyst
Rockland, MA
As a Project Manager and Chemical Engineer, Emily oversees the WaterSuite contaminant database and supports source water, process engineering and research projects.
781-753-6666 X 413
Emily Smith
Data Analyst
Rockland, MA
Adam is a GIS analyst, analyzing spatial data sets utilizing mapping software, and is WaterSuite’s back-end developer, focused on the database and scripts.
781-753-6666 X 413
Adam McKeagney
Data Analyst
Geospatial, Data and Information Management
San Diego, CA
Tod is Corona’s program manager for SanGIS, San Diego
Geographic Information Source, a joint powers authority between the City and County of San Diego.
858-874-7020
Tod Chee
SanGIS Program Manager
Rockland, MA
Jessica has over 17 years of experience using and implementing geographic information systems software for a variety of clients.
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781-753-6666 X 422
Jessica Zichichi
Sr. GIS Analyst
Rockland, MA
Jon is responsible for the design, implementation, and management of all internal networks and WiFi environments for Corona offices nationwide.
781-753-6666 X 431
Jon Janezic
Business Systems and IT Manager
Corona Business Operations
Rockland, MA
Annemarie had been with Corona from the very beginning, providing oversight and management of accounting, accounts payable, and accounts receivable.
781-753-6666 X 100
Annemarie Naughton
AP/AR
Rockland, MA
Denise has been with the Corona since 2015 serving as the Office and Accounting Controller.
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781-753-6666 X 409
Denise McDonough
Controller
Louisville, CO
Karen is the Office Administrator and Project Controls Coordinator in Corona’s Colorado office.
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303-544-2161 X 444
Karen Hada
Office Administrator/Project Controls
