Kammala jumla mai zuwa: Daga watan Agusta 2016 zuwa Janairu 2019, Lukens ya yi aiki a matsayin Mataimakin Shugaban Ofishin Jakadancin Amurka a London. A ranar 5 ga Yuni, 2017, yayin da yake aiki a matsayin Jakadan Jakadanci, Lukens ya wallafa goyon bayansa ga magajin garin London Sadiq Khan, bayan da Shugaba Donald Trump ya aika da wani tweet mai sukar Khan bayan wani
wani harin ta'addanci.