CRC Team

Margaret Berger

Principal Investigator, MA/RPA

Margaret has been a professional archaeologist in Washington State since 2006. She earned her MA from the University of Washington in 2004 and worked as a Cultural Resources Intern for WSDOT prior to joining CRC. Over the past decade, Margaret has completed over 350 CRM overviews, surveys, and testing projects for private, and public local, state, and federal agencies. Components of these projects included federal, state, and tribal consultation; state and federal compliance (SEPA, NEPA, and Section 106 of the NHPA); geomorphological analysis; field investigation; GIS mapping; analysis and documentation of precontact and historic sites, and historic structures; laboratory analysis; and preparation of technical reports. Margaret’s project experience and working relationships with various agencies and local tribes demonstrates her competence and commitment in the field of CRM.

Sonja Kleinschmidt

Projects Manager, MS/RPA

Sonja began her career as a project archaeologist in 2011 and has professional experience in western and central Washington. Sonja has completed over 200 CRM overviews, assessments, and monitoring plans for private firms, and local, state, and federal agencies. Her background in cultural and environmental compliance demonstrates her abilities to successfully conduct client coordination; background research for projects potential to contain cultural resources through an examination of land use history based on the cultural and environmental factors; field investigations; laboratory analysis; and technical report writing, all commensurate to the project scope and budget. Sonja is familiar with federal and state regulations for completing compliance documents with EO 2102, SEPA and NEPA, as well as Section 106 of the NHPA.

Ian Kretzler

Project Archaeologist, PhD/RPA

Ian has worked on archaeological research and historic preservation projects in Washington, Oregon, and Idaho. He received a MA and PhD in anthropology from the University of Washington. His graduate training focused on collaborative and indigenous archaeologies, which offer strategies for incorporating the perspectives of tribes, the general public, and other stakeholders into cultural heritage documentation and protection. Since joining CRC in 2019, Ian has conducted background research, field surveys, and technical writing for a variety of projects around Puget Sound.

David Carlson

Project Archaeologist, PhD candidate

David has worked on archaeological research and heritage management projects in Florida, North Carolina, Virginia, Oregon, and Washington State. He earned a Certificate in GIS from the University of West Florida in 2009 and his MA from the University of Washington in 2012. He is currently finishing his PhD there as well. His research and training focuses on racism and racialization, historic archaeology and historic artifact analysis, landscape archaeology, survey methods, and GIS. He has additional experience in lithic analysis. Since joining CRC in 2021, he has conducted background research, field surveys, laboratory analysis, and technical writing for projects across Washington State.

Jessica Gardner

Project Archaeologist/Historic Built Environment, BA

Jessica completed her BA in Anthropology from WWU and worked in serval states around the U.S. before working solely in the Pacific Northwest in 2014. In 2015, she join CRC and has completed over 100 projects. Her work has focused in western and central Washington with project contributions including: field survey and monitoring; geomorphic analysis; research concerning cultural and historic documentation; laboratory analysis; technical writing; and historic property documentation. Jessica is CRC's Whatcom County based archaeologist.

Glenn Hartmann


Glenn has a 30+ year career of providing cultural resources services throughout the Pacific Northwest in the public and private sectors, as an agency archaeologist and consultant on numerous CRM overviews, surveys, testing and data recovery projects. He received his graduate training at Washington State University where he completed his MA and doctoral coursework in anthropology. Glenn has extensive regional experience in working with state historic preservation offices and tribes, as well as with state, local and federal agencies, including on-call cultural resources investigations for transportation, environmental, and public works agencies.

Teresa Peterson

Office Manager