Cancer screening reduces mortality through early detection and prevention, yet screening adherence remains uneven among working-age adults, especially shift-based and hourly workforces. Employer-sponsored clinics improve access to primary care but often depend on offsite referrals for mammography, colonoscopy, and other diagnostic services—creating “referral leakage,” where eligible individuals do not complete screening after recommendation. Mobile screening (e.g., mobile mammography units, onsite cervical screening events, or workplace-based stool-test distribution with navigation) may reduce structural barriers, increase convenience, and enable closed-loop follow-up through employer clinic care coordination. This narrative review synthesizes evidence on mobile screening units, workplace screening interventions, and navigation/outreach strategies that support screening completion. We propose an employer-integrated implementation framework and identify research gaps and operational considerations for scalable adoption