Founded with a mission to deliver reliable, high-quality HVAC, plumbing, and electrical solutions , IRBIS Air Plumbing Electrical has built a strong reputation for performance, professionalism, and customer-first service . Sign-on bonus: Eligible lead installers with 4+ years may receive a $4,000 sign-on bonus: $1,000 at 90 days, $1,000 at six months and $2,000 at 12 months.