Sean Peterson

Professional Experience Sean’s practice focuses on estate planning, tax law, business succession planning, and probate. He has experience drafting a variety of advanced planning documents, including wills, trust instruments, durable powers of attorney, and advanced directives. He also has experience advising business owners on formations, foreign qualifications, and state and local tax issues. Prior to […]


Shea Fanelli

Professional Experience Shea is a litigator with the firm’s trust and estate litigation practice group and assists clients in matters involving will contests, trust disputes, fiduciary abuse, guardianships, vulnerable adult protection actions, and elder abuse issues.  Prior to joining Helsell Fetterman, Shea was a litigator at a firm in Grays Harbor where she advised individuals […]


Kristy Ball

Professional Experience Kristy practices in the firm’s litigation department, handling cases involving personal injury, employment, business disputes, health insurance and property disputes. Kristy also represents physicians and other health care providers in licensing and disciplinary disputes. Prior to joining Helsell Fetterman, Kristy worked at a boutique law firm for fourteen years. During her time at […]


Katherine Hekstra

Professional Experience: Katherine Hekstra’s practice focuses in the areas of health care law and medical malpractice, specifically defending physicians and hospitals against medical malpractice lawsuits and in professional licensing proceedings. Kate grew up in West Michigan and attended Grand Valley State University for her undergraduate and master’s degrees in Biomedical Science. She worked in a […]


Mac Thomsen

Professional Experience Mac Thomsen joined Helsell Fetterman in 2022 and is an associate in the firm’s litigation practice group. Prior to joining Helsell, Mac spent a year clerking for the Honorable Judge Edirin Okoloko in the Snohomish County Superior Court. Mac also spent a summer serving as an extern for the Honorable Judge John Ruhl […]


Hannah Driscoll

Professional Experience Hannah Driscoll’s practice focuses in the areas of employment and education law, specifically defending schools and employers against discrimination lawsuits, as well as advising employers of best practices. Additionally, Hannah works on personal injury and complex litigation matters including commercial disputes, products liability, and catastrophic injury litigation. Prior to joining Helsell Fetterman, Hannah […]


Jennifer Sehlin

Professional Experience Jennifer’s practice emphasizes residential and commercial real estate transactions, land use, and landlord tenant law.  Her clients include real estate developers, property management companies, residential and commercial landlords, tenants, and individual homeowners. Prior to joining Helsell Fetterman, Jennifer worked in a boutique real estate law firm in Snohomish County, where her practice touched […]


Yuriy Korol

Professional Experience Yuriy focuses his practice in the areas of land use, environmental law, and real estate. Prior to joining Helsell Fetterman, Yuriy worked as a litigator at a regional civil defense firm in Seattle where he advised and represented clients in a variety of personal injury and construction liability matters. He also has substantial […]


Jenna Mark

Professional Experience Jenna Mark’s practice focuses in the areas of health care law and medical malpractice, specifically defending physicians and hospitals against medical malpractice lawsuits and in professional licensing proceedings. Prior to joining Helsell Fetterman, Jenna worked at a national firm where she defended clients in a variety of complex litigation matters including commercial disputes, […]


Hannah Lasting

Professional Experience Hannah Lasting initially joined the firm as a summer associate after receiving the 2020 Richard S. White Fellowship. After spending her summer at Helsell Fetterman in 2020, Hannah returned to the firm as an associate in 2021. Hannah grew up in San Diego, California. She moved to Seattle to attend the University of […]