Providing a website featuring non-downloadable software for assigning personnel to overtime shifts and jobs based on employer-defined rules, scheduling job shifts and determining the number of employees needed for each shift, creating personnel rosters for job shifts, allocating shifts and overtime assignments to personnel, and notifying personnel of overtime availability and shift assignments via mobile device; Providing a website featuring technology that enables users to create personnel rosters for job shifts according to user-defined rules, notify workers of overtime opportunities via email, text messages and automated telephone calls, schedule shift assignments and overtime assignments, view personnel work schedules in an online calendar, view reports online regarding work days, vacation days and overtime hours, bid for and trade job shifts and overtime assignments online, monitor the user's place in an online queue to receive job assignments, and accept job shift and overtime assignments online; Software as a service (SAAS) services featuring software for assigning personnel to overtime shifts and jobs, scheduling job shifts and determining the number of employees needed for each shift, creating personnel rosters for job shifts, allocating shifts and overtime assignments to personnel, and notifying personnel of overtime availability and shift assignments via mobile device