Meet our team of experienced engineers and scientists.
Sherry VanDuyn, P.E., CHMM
President
Senior Civil Engineer
Sherry manages Phase I ESAs, Phase II Investigations, response action plans, contingency plans, remediation design, contracting and bidding, remediation cost estimating, and overseeing response action and construction activities for large complicated redevelopment and civil works projects.
Phone: (952) 295-9408
Jessica Fitzpatrick
Chief Financial Officer
Senior Environmental Scientist
Jessica specializes in conducting and managing Phase I ESAs and Phase II remedial investigations, and managing Landmark’s geographic information system (GIS). She heads up our team of Phase I experts including single and multiple parcel projects and more complicated corridor assessments.
Phone: (952) 295-9416
Jerry Mullin
Vice President
Geologist
Jerry specializes in managing and conducting environmental investigations and remedial activities associated with the redevelopment of large tracts of commercial and industrial properties.
Phone: (952) 295-9403
Eric Gabrielson
Vice President
Environmental Scientist
Eric specializes in Phase II Investigations, remedial activities including on-going groundwater and soil vapor remediation, as well as radon measurement and mitigation. Eric provides overall management of the Landmark field staff.
Phone: (952) 295-9404
Jason Skramstad, P.E.
Vice President
Environmental Engineer
Jason specializes in soil, soil vapor, and groundwater remediation technologies, as well as design and construction oversight. Jason is an expert in vapor mitigation and groundwater remediation.
Phone: (952) 295-9405
Caroline Elling
Partner
Environmental Scientist
Caroline manages grant writing and grant administration, preparing Phase I ESA and Phase II Investigation reports, and is a GIS expert and works on stormwater compliance issues.
Phone: (952) 295-9402
Shannon Hahnen, P.E.
Partner
Civil Engineer
Shannon manages Phase II Investigations, Response Action Implementation, and is an expert in design and construction oversight of vapor mitigation including sub-slab depressurization systems, new construction venting systems and radon ready systems.
Phone: (952) 295-9407
Calista Timmerman
Partner
Environmental Engineer, EIT
Calista conducts and manages all aspects of Phase I ESAs, Phase II Investigations and Response Action Implementation efforts, including remediation design and cost estimating.
Phone: (952) 295-9417
Aaron Kuck
Partner
Environmental Scientist
Aaron is responsible for conducting on-site field activities related to investigations and remedial actions including contaminated soil removal, tank removals, vapor mitigation activities, and sub-slab depressurization system testing.
Phone: (952) 295-9409
Mark Meier
Partner
Senior Environmental Scientist
Mark conducts pre-demolition hazardous materials surveys and manages the removal of hazardous materials from buildings. In addition, he conducts Phase I and Phase II Investigations, provides remediation and vapor mitigation oversight, and is an expert in all issues concerning asbestos and lead paint.
Phone: (952) 295-9410
Ken Haberman
Senior Environmental Scientist
Ken specializes in providing regulatory review and developing brownfield redevelopment strategies for clients who are interested in the liability protections and financial incentives offered by local, state and federal agencies.
Phone: (952) 295-9412
Tristin Faust, P.G.
Geologist, Geological Engineer, EIT
Tristin assists with on-site field investigations and reporting for Phase II Investigations and remedial actions. He provides in-depth project support with reduction and interpretation of engineering and geology data utilizing GIS and specialized soil boring and hydrogeology software.
Phone: (952) 295-9414
Nicole Bonde-Jones
Environmental Scientist
Nicole conducts on-site investigations and reporting for Phase I ESAs, Phase II Investigations, and Response Action Plans, which includes providing GIS support.
Phone: (952) 295-9415
Amanda Schrag
Environmental Engineer
Amanda conducts Phase I ESAs, Phase II Investigations, and Response Action Implementation field work and assists with report preparation.
Phone: (952) 295-9413
Ann Braem
Office Manager
Ann manages the office, coordinates with project managers, and conducts accounting and administrative tasks.
Phone: (952) 295-9411
Blake Shaw
Environmental Scientist
Blake assists with on-site field investigations and reporting for Phase II Investigations and remedial actions.
Phone: (952) 295-9419
Sarah Anderson
Environmental Scientist
Sarah conducts pre-demolition hazardous materials surveys and manages the removal of hazardous materials from buildings.
Phone: (952) 295-9406
Victoria Welter
Technical Writer
Victoria assists with accounting and administrative tasks, along with Phase I ESAs.
Phone: (952) 295-9421
Reina Balley
Environmental Geoscientist
Reina assists with on-site field investigations and reporting for Phase II Investigations and remedial actions.
Phone: (952) 295-9401
Project Partners
Kelton Barr, PG
Hydrogeologist
Kelton, a project partner, specializes in groundwater hydraulics, hydrogeology, bioremediation, and groundwater modeling.
Phone: (612) 360-0730
Cathy Schultz
Hydrogeologist
Cathy, a project partner, conducts Phase I ESAs, Phase II Investigations and Response Action Implementation field work and reports. Cathy is located in Bemidji and provides support for projects located across northern Minnesota and North Dakota.
Phone: (218) 556-3776
Carolyn Kohrs
Geological Engineer
Carolyn, a project partner, manages and conducts Phase I ESAs and Phase II Investigations related to brownfields redevelopment.