[12] Working through diplomatic channels, the delegation was able to secure permission to finally establish a monument to the Royal Newfoundland Regiment at the First World War Battlefield in Gallipoli.

[16][17] He attempted to regain his position of Speaker of the Assembly following the convening of the fall 2019 session but was defeated by fellow Liberal MHA Scott Reid.

[18] While serving as a back-bencher he led Private Member Resolutions on establishing a network of electric vehicle charge stations,[19] achieving net zero emissions by 2050,[20] increasing food self-sufficiency[21] and reducing the prevalence of vaping in youth.

[22] On October 20, 2020, Trimper said transient people in Happy Valley-Goose Bay were "choosing" a risky lifestyle, in the wake of a video that showed an Inuk man being thrown to the ground during an arrest in the town by a municipal enforcement officer.

[26] In 2022, Trimper was one of the few MHAs to publicly oppose the Bay Du Nord offshore oil project and released a video detailing the environmental impacts.