Our People


man in a black jacket and blue hat sitting on a boat
Mark S. Laska, PhD

Founder & President


Mark's Favorite Ecosystem
New World Tropical Rainforests

woman wearing black jacket and black beaning smiling
Jessa Spainhower

Vice President of Operations


Jessa's (Former) Hobby
Improv Comedy

Photo of man in black jacket, grey pants, and hat standing on top of a mountain
Joshua D. Eldridge, MS

Mountain Regional Director


Joshua's Catch Phrase
Good work leads to more work

Damian Holynskyj
Damian Holynskyj, MCP

Eastern Regional Director


Damian's Favorite Outdoor Activity
Skiing the trees after a fresh snowfall


woman in scuba gear under water
Jill McGrady, PhD

Senior Ecologist & San Diego Office Director


Jill's Secret Skill
Scuba Diving

Bio photo
Alejandro BaladrĂ³n, MAS

Senior Ecologist & Hydrologist


Alejandro's Favorite Travel Destination
Upper Valley of Lozoya - Spain
Rex Bergamini, PhD
Rex Bergamini, PhD

Senior Ecologist


Rex's Favorite National Park
Islas del Golfo de California Biosphere Reserve
Bio Photo
Andrew Keller, MS

Senior Ecologist


Andrew's Favorite Weekend Activity
Restoring his historic adobe home


woman in blue jacket and blue beanie wearing a backpack hiking in the snow
Beyhan T. Maybach, PhD

Senior Ecologist


Beyhan's Favorite Ecosystem
Tropical & Temperate Rainforest
man in black jacket and black beanie holding a fish and fishing pole
David Yozzo, PhD

Senior Ecologist


David's Favorite Ecosystem
Tidal Freshwater Marshes
Bio Photo 2
Phil Rosenberg, PG

Senior Hydrologist


Phil's Favorite Hobby
Sport Fishing
Bio photo
Chris Loftus, PLA

Senior Landscape Architect


Chris' Hobby
Playing in an alt-country band


Woman in blue t-shirt and work gloves at campsite
Ellie Garza, PLA

Associate Landscape Architect


Ellie's Favorite Place to Camp
Roosevelt National Forest

A white women in blue shorts and a white shirt, wearing an orange hydration vest runs toward the camera
Esa Crumb, MS

Associate Ecologist


Esa's Favorite Plant
Elephanthead Lousewort

woman in a black jacket and red hat smiling
Ashley Tuggle, MEM

Associate Ecologist


Ashley's Super Power
Telling stories for office morale

man in a blue shirt, grey hat, and sunglasses holding a fish
Justin Apfel

Ecologist


Justin's Favorite Outdoor Activity
Fishing


Woman in blue jacket with blue headband holding flower and smiling
Cate Collinson, P Biol

Ecologist


Cate's Favorite National Park
Banff National Park

Man on one knee with outstretched arms wearing a blue polo shirt and grey shorts
Justin Heyerdahl, MESM

Ecologist


Justin's Favorite Hobby
Growing Exotic Blue Hibiscus

woman in an oragne jacket and tan hat smiling
Emily Hazelwood, MAS

Ecologist


Emily's Favorite Ecosystem
California Kelp Forest
woman in scuba gear under water next to coral
Amber Sparks, MAS

Ecologist


Amber's Favorite Place to Dive
Underneath Oil Rigs

Woman in blue shirt with backpack and smiling
Liz Clift, MFA

Copy Editor


Liz's Favorite Hike
Chain Lakes Trail

woman wearing grey jacket and blue backpack smiling
Lilia Gavrilenko, MS

Controller


Lilia's Favorite Travel Destination
Europe, especially Russia

Bio photo
Davis Ladd

Marketing & Business Development


Davis' Favorite National Park
Zion National Park