"We are standing by, ready to not only backfill need as it arises with new F-16 builds but also any modifications to F-16s as well as training, equipment and systems," St. John was quoted by the British newspaper as saying ahead of the Paris Air Show, adding that a decision on this would be made only after discussions between Ukraine, the US and its NATO allies.
Lockheed Martin may also consider establishing a base in Ukraine or near its territory after conflict is over, the company official said.
"When these hostilities end, there will have to be a sustaining presence for training and maintenance and then the logical place would be for that to be in and around Ukraine," St. John added.
Last week, NATO Secretary General Jens Stoltenberg said that the timing of the delivery of F-16 fighter jets to Ukraine would depend on progress in the training of Ukrainian pilots.
Earlier in the month, Ukrainian President Volodymyr Zelensky said at a European Political Community press conference in Kishinev that a number of countries were ready to provide Ukraine with F-16s, the fighter jet of its choice.
Russia has slammed the possible delivery of F-16s to Ukraine, warning that the jets will become a legitimate military target for Russian forces. Russian Foreign Minister Sergey Lavrov has warned that the delivery of F-16 fighters to Ukraine will be a further escalation because the jets have a modification that makes them nuclear-capable.