Meet the Team

A woman with long hair, glasses, and braces smiling happily, holding a young child wearing a navy blue beanie and yellow hoodie, sitting in front of a decorated Christmas tree with lights.

Aimee Krieger

President

Program Specialist at the Beaverton Swim Center. Aimee is accustom to having eyes rolled at her (mostly by her sons) and does not shy away from goofy fun and time with people she cares about.

A simple drawing of two stick figures, one with a smile and the other with a surprised expression, along with the text "I've got your back."

Colin Perkins

Past President

Pool Operator at the Tualatin Hills Aquatic Center. Colin will always have your back, though he does have an aversion to having his picture taken.

Woman holding a large fish with a person in protective gear and hooded clothing, outdoors near water and trees.

Melissa (Mayer) Van Altvorst

President Elect

Office Tech at the Tualatin Hills Aquatic Center. Melissa is a wrangler of crab as well as two active, wonderful children.

A person wearing a wide-brimmed hat with a waterreflection, blue shirt, and sunglasses, holding a girl with long hair and a pink sweater, sitting outdoors near yellow flowering bushes.

Brenda Peterson

Treasurer

Office Tech with Maintenance Operations. Brenda is passionate about her family, softball, and animals.

A woman with a large bun hairstyle and a red headband holding a colorful snake and a lizard outdoors during daytime, with autumn leaves in the background.

Hanna Dörnhofer

Secretary

Community Engagement Park Ranger at the Tualatin Hills Nature Center and with Nature & Trails. Hanna loves animals and plants, meeting new people, and is always down to talk union stuff. She’s known for playing pranks on her coworkers and bringing flowers back to the office.

A peaceful park scene with tall, moss-covered trees lining a winding pathway. There are benches along the path and lush green grass and foliage surrounding the area.

Casey Jennett

Representative

OSEA Representative for THPRD since Fall 2025