bids are invited for custom bid for services - job contract for o and m of e and m installations, dsr items, hiring of lgihts for illumination, photometry, repair works to pumps, batteries, servicing, testing of switch gears, fire alarm maintenance - job contract for 24 x 7 operation & maintenance of electrical and mechanical installations at terminal buildings, residential colony, guest house, atc tower and other ancillary buildings/areas as decided by the engineer in charge including periodical maintenance, repairs, attending to complaints /fault /breakdowns and taking rectification action, ensuring serviceability / satisfactory working condition of the entire system, maintenance of records/documentation etc. on all days including sundays and national/public holidays on round the clock basis as per the detailed specifications, terms and conditions, as per the direction of engineer in charge or their authorised representative etc. complete as required.