Named president of the Seattle Seahawks and First & Goal Inc. on September 24, 2018, Arnold is responsible for all financial and business operations, sales, marketing and administration for the Seahawks. As president of First & Goal Inc., he directs the management of Lumen Field, Lumen Field Event Center, and WAMU Theater. Arnold is entering his 32nd season with the Seahawks. Prior to being named president, he served as COO from 2013-18. In April 2021, the team announced his extension as president through 2027.

Named president of the Seattle Seahawks and First & Goal Inc. on September 24, 2018, Arnold is responsible for all financial and business operations, sales, marketing and administration for the Seahawks. As president of First & Goal Inc., he directs the management of Lumen Field, Lumen Field Event Center, and WAMU Theater. Arnold is entering his 32nd season with the Seahawks. Prior to being named president, he served as COO from 2013-18. In April 2021, the team announced his extension as president through 2027.

Under Arnold's leadership, the Seahawks organization continues to be one of the strongest in the NFL, setting franchise records for overall ticket, suite and sponsorship revenue, and maintaining a streak of 180 consecutive home game sellouts going into the 2025 season.

The team consistently ranks in the NFL's top 10 in numerous categories, including local and national fanbase, fan experience, retail, and digital engagement.

Arnold's commitment to making an impact off the field continues to be one of the organization's top areas of focus. The club supports over 2,500 charities around the Pacific Northwest and beyond and uses its unique and powerful platform to support community programs around the region in areas including youth empowerment, the future of football, social justice, community response, and the military community.

Lumen Field continues to be one of the toughest places for opposing teams to play and has one of the best in-stadium fan experiences in the NFL. Arnold's vision to create memorable experiences and cultivate genuine relationships with the 12s has led the team to consistently rank in the top 10 of the NFL's Voice of the Fan Survey, including the No. 1 overall ranking in 2013 and 2016.

Beyond football, Lumen Field continues to be one the busiest sports & entertainment venues in the region, hosting more than two million guests each year. The venue has hosted numerous concerts with global musical artists including Beyoncé, Coldplay, Metallica, Rolling Stones, Taylor Swift, and U2, in addition to events such as Monster Jam, Supercross, corporate summits and flat shows. Showcasing its readiness to host high-profile international events, in 2022 Lumen Field was named a host venue for the 2026 FIFA World Cup. The venue is scheduled to host six matches, including one featuring the U.S. Men's National Team, as part of the world's most premier international soccer tournament that will span matches across three countries. In advance of the 2026 FIFA World Cup, Lumen Field will also host six matches for FIFA's first-ever Club World Cup in 2025, featuring Seattle Sounders FC, Atlético de Madrid, Paris Saint-Germain, Botafogo, CA River Plate, Urawa Reds, and FC Internazionale.

In February 2025, Arnold was recognized by the Seattle Sports Commission as 2025 Sports Leader of the Year. He was also recognized by the Puget Sound Business Journal as a 2024 Director of the Year for his board of directors service.

Arnold is currently a member of the NFL Fan Engagement and Major Events Committee. He joined the Virginia Mason Franciscan Health Board of Directors in 2023 and serves on the BDA and Boeing Classic Advisory Boards. He is also a member of the Washington Chapter of the American Cancer Society's CEO's Against Cancer.