Lotus says it has 'tasty options' to replace Romain Grosjean, who will switch to Haas for 2016 after four years with the Enstone operation.
Grosjean confirmed last week that he will join Formula 1's newest team next season, leaving Lotus to search for a driver to partner Pastor Maldonado.
"We know we have Pastor confirmed for one seat and we know that there are quite a few tasty drivers available out there and we’re doing everything to ensure that we’ve got a desirable race seat, which needs to be filled," explained deputy team principal Federico Gastaldi.
"What happens next is that there’ll be a number of discussions in a number of places then at some point we’ll have an announcement to make."
Maldonado added that he was not fussed by the identity of Grosjean's replacement.
"Honestly I have no preference," he said. "Throughout your career you work with a variety of team-mates so you get used to working with different people.
"Ultimately, everyone is trying to make the car faster and perform as well as it can for an event, so you’re all working to the same objectives."