Earlier this week, Blue Origin posted a job opportunity for a "senior manager" to oversee tank fabrication for "Quattro," and the description contained some intriguing information.
"As part of a hardworking team of specialists, technicians, and engineers you will be the Senior Manager of Gen 2.0 Tank Fabrication, and will own the production execution of the most structurally complex and schedule-critical subsystem on the vehicle—the propellant tank," the job posting states.
Quattro is the company's nickname for a more powerful upper stage for the New Glenn rocket, which will feature four BE-3U engines instead of the two currently powering the booster. Blue Origin revealed plans for this more powerful variant of New Glenn, 9x4 (nine first stage engines, and four upper stage engines), last November.