Peggy Myre

President/Marketing Manager

Peggy Myre, President and Founder of Exa Data & Mapping, has over 30 years of experience in building  bridges between environmental science and information technology.  With degrees in Geology (BS) and Oceanography (MS), Ms. Myre has applied her skills in database management, programming, visualization and GIS to more efficiently and effectively managing burgeoning volumes of data collected for environmental and marine-related projects.  She has recruited like-minded scientists with specialized skills in database management, statistics, programming, validation, or other software.  Ms. Myre has demonstrated leadership qualities in her role as project manager for a variety of large projects for the U.S. Army Corps of Engineers, NOAA, EPA, as well as interagency groups, states, ports, and international agencies.

 Ms. Myre’s scientific expertise includes dredged material monitoring, contaminated sediment assessment and management, and sediment guideline development.  She has applied her oceanographic background to projects that assess impacts of marine outfalls, designation of marine protected areas, dredged material disposal, oil spills, and seabed mineral exploration.  She has a passion for strategic planning and public outreach, building user-driven systems for managing information to optimize use and delivery of the data to interested parties.  Her work history includes projects in New England, New York, California, Texas, and the Northwest.  Ms. Myre brings practical experience in marine and geological field work that informs her ability to understand the full spectrum of data collection. Finally, she has a 25-year record of publication and presentation at environmental, dredging, and information management conferences.


Michael Tweiten

vice president/database manager

Dr. Tweiten is a data management specialist with ecological expertise. He published spatial, time series and multivariate data analysis in peer-reviewed ecological journals and directly engaged in field data collection including vegetation mapping, restoration monitoring, insect population surveys, and sediment core sampling. Both areas of expertise provide insight into the data management needs of environmental assessments and restoration monitoring. He has extensive experience with the design of data ingest templates, data migration, database quality assurance, stored procedures development and data structures used to support ligation quality database services. He developed database procedures to enhance the analysis and interpretation of environmental data including calculating significance of bioassay tests and producing specialized analyses including logistic regression modeling and dioxin toxicity equivalency. He routinely works across software platforms to meet client needs including R, QGIS, MySQL, POSTGIS, MS Access, and Pentaho.


Dawn Smorong

Vice President/Environmental Scientist

Dawn Smorong has over 20 years experience as an environmental scientist working on projects in Canada and the US. She specializes in ecological risk assessment, environmental data management, guidelines development, and contaminated sediments. She has specialized expertise in designing and implementing biological, physical, and chemical sampling programs with the objective of collecting data to support environmental assessment projects. During the course of her career, Ms. Smorong has gained extensive experience working with computer applications to acquire and organize data, design and develop databases, create GIS projects, and analyze data (e.g., database queries, charts, graphs, statistical analyses).  The majority of this experience involved aquatic assessments, for which Ms. Smorong collected and analyzed data for water, sediment, fish communities, fish tissue concentrations, benthic communities, and wildlife. Her professional skills include data management, risk analysis, design and implementation of field studies, and analysis and interpretation of data.

Dawn has experience supervising technical work teams, developing project workplans, developing and managing project budgets, and balancing client needs and regulatory concerns. Dawn holds a BSc in Agriculture from the University of British Columbia and a Post-Baccalaureate Diploma in Environmental Science from Capilano College. Her work as an environmental scientist has resulted in seven published journal articles and more than 50 report publications related to the assessment and management of natural resources.


Lorraine Read

Environmental Statistician 

Ms. Read is an environmental statistician with 30 years of professional experience in the assessment and interpretation of environmental and biological data.  Past projects have integrated environmental quality data from surface water, sediments, and soils, with biological endpoints including abundance, bioaccumulation, and bioassay data from terrestrial, marine, and freshwater flora and fauna.  She has extensive experience developing statistical designs for sampling programs in a variety of settings in the US and Canada, including dredge material suitability and disposal site monitoring, regional background surveys of Puget Sound sediments, trend monitoring, and site characterization.  Her knowledge of statistics and the scientific method has equipped her with the ability to incorporate statistical rigor into the sampling of complex ecological systems, and the subsequent analysis of the data obtained. 

Ms. Read is skilled at conducting graphical and statistical analyses using R scripts (R: a language and environment for statistical computing) for one-time evaluations, or batch processing of repetitive analyses associated with large database systems. She is eager to utilize shared analytical tools (e.g., R and RMarkdown) to facilitate data analysis and interpretation among colleagues and clients. At Exa, Ms. Read has provided statistical and technical support on projects such as standardizing and stream-lining the statistical evaluation of sediment toxicity data, evaluating stochastic models used for predictions and decision making, and generally providing a statistical perspective on the collection, interpretation, and utility of environmental data.


Grace Peven

GIS Analyst

Grace is a graduate of Western Washington University with a degree in Geography (emphasis in Natural Resource Management) and a minor in GIS. She has worked with natural resource data and developed innovative strategies to manage and protect water resources, both in the field and through complex spatial analysis. Outside of data collection in the field, Grace has experience with web-mapping, spatial and statistical analysis, geodatabase management, stream network modeling, satellite imagery analysis, cartography, and habitat suitability modeling.