Contact Us

A chipmunk looks back from a ledge, seeming to say "hello!".
A golden-mantled ground squirrel in Rocky Mountain National Park.

NPS photo/M. Reed

Biological Resources Division
Natural Resources Stewardship and Science Directorate

1201 Oakridge Drive, Suite 200
Fort Collins, CO 80525

Phone: 970-225-3505
Fax: 970-225-3585

Office of the Division Chief


Wildlife Conservation Branch
Wildlife Health Branch
Landscape Restoration and Adaptation Branch
Biodiversity Discovery Program

Office of the Division Chief

Todd Suess
Biological Resources Division Chief

Email Todd

Marie Felder
Administrative Support Assistant

Email Marie

Wildlife Conservation Branch

Mike Wrigley
Branch Chief
Expertise: At-risk species (Federally listed) and other rare species, wildlife management, birds, mammals, amphibians and reptiles, habitat restoration, species conservation, landscapes
Email Mike

Amanda Hardy, PhD
Wildlife Biologist
Expertise: human-wildlife interactions, terrestrial mammal ecology, climate change adaptation, bison conservation, road ecology
Email Amanda

Nicole Brandt Turner
Pathways Biological Science Technician
Expertise: marine ecology, migratory wildlife, human-wildlife interactions
Email Nicole

Dave Treviño
Wildlife Biologist
Expertise: Avifauna, monarch butterfly, conservation biology
Email Dave

William (Bill) Austin
Wildlife Biologist
Expertise: At-risk species (threatened and endangered)/special status species
Email William

Jennifer Sieracki
Invasive Animal Coordinator
Expertise: invasive species ecology, spatial modeling, landscape ecology
Email Jennifer

Kass (Hardy) Bissmeyer
Management Assistant
Expertise: large landscape conservation, landscape initiatives, corridors, pollinators, NP System Plan
Email Kass

Wildlife Health Branch

Jenny Powers, DVM, PhD
Branch Chief
Expertise: wildlife anesthesia, wildlife fertility control, disease of ungulates
Email Jenny

Scott Ratchford
Wildlife Technician
Expertise: wildlife capture and handling, anesthesia, biological sampling, GIS, database management
Email Scott

CDR Danielle Buttke, DVM, PhD, MPH, DACVPM
One Health Coordinator
Expertise: public health, zoonotic disease, environmental health
Email Danielle

Nathan Galloway
Disease Ecologist
Expertise: wildlife disease, population ecology, statistical models
Email Nathan

Tracy Thompson
Veterinary Medical Officer
Expertise: animal welfare veterinarian, herpetological health specialist
Email Tracy

Michelle Verant
Wildlife Veterinarian
Expertise: veterinary assistance and consultation, wildlife mortality investigation, One Health, science communication
Email Michelle

Allie Petersen
Wildlife Health Technician
Expertise: animal welfare, wildlife health, IACUC
Email Allie

James C Howard IV
Integrated Pest Management Physical Scientist
Expertise: pesticides, integrated pest management, pollinators, forest health
Email James

Jim Pieper
Servicewide Integrated Pest Management Coordinator

Email Jim

Landscape Restoration and Adaptation Branch

Lori Makarick
Branch Chief
Expertise: native plant conservation, invasive plant management, forest health, ecological restoration, pollinator habitat protection
Email Lori

Terri Hogan
Invasive Plant Program Manager
Expertise: plant ecology, invasive plant management, rare, at-risk (threatened and endangered) plant species, plant community ecology
Email Terri

Gregory E. Eckert, PhD, CERP
Restoration Ecologist
Expertise: restoration ecology, soil ecology, rare species management, wildland fire and natural disturbance, native plant materials

Email Greg

Jordan Spaak
Expertise: livestock/grazing management, rangeland/grassland management, domestic stock and wildlife interactions
Email Jordan

Alex Stoneburner
Biological Science Technician (Data Manager)
Expertise: data management, livestock management, grassland ecology
Email Alex

Biodiversity Discovery Program

Kris Barnes
Biodiversity Discovery Program Lead

Email Kris

Kiersten Jarvis
Project Manager
Expertise: citizen science, BioBlitz, youth internships
Email Kiersten

Parker Hopkins
Data Technician
Expertise: citizen science data manager, outreach
Email Parker

Last updated: February 24, 2020