Cold email scales to 200-500 employer contacts per week with zero incremental time per contact after setup. Open rates of 55%+ are achievable with job-signal-personalized subject lines. LinkedIn connection requests to VP and Director level HR contacts convert at 30-45% acceptance when sent with contextual notes. The staffing firm new client machine uses LinkedIn for high-priority targets — defense contractors, senior HR leadership — in parallel with email. Full system at omnionlinestrategies.com/staffing-firm-new-client-machine.