The phrase "at once ensuring" is correct and usable in written English.
It can be used to indicate that something is being done immediately while also providing assurance or certainty.
Example: "The new policy is designed to streamline operations, at once ensuring efficiency and compliance."
Alternatives: "simultaneously guaranteeing" or "instantly securing".
CBS, which emphasizes the overall stability of its network, reinforced that point Tuesday, when it ordered renewals for four programs at once, ensuring that its entire daytime lineup will return intact for another season.
And iMessages has a bonus: the ability to work with many devices at once, ensuring your messages stay in sync.
Probably, since you haven't installed Vista yet and this update actually installs all of the Service Packs at once, ensuring you're completely up-to-date.
So enterprises will need to manage physical, virtual and cloud computing environments all at once, while ensuring security and compliance.
What steps will Saudi Arabia and the UAE take at once to ensure that no further illegal actions take place?
Sue was a single mom who worked hard — sometimes two jobs at once — to ensure that her beloved daughter would enjoy a better life.
During that period guards worked around the clock as the trains rolled in, sometimes several at once, to ensure as many Jews were murdered as possible as the war began drawing to a close.
This procedure may generate slightly different weights compared to learning forward and backward connections at once but ensure stability and effectivity of the learning approach.
Ward also developed the 'total release' tactic, dropping the entire load at once, to ensure maximum chance of a kill.
"At Kings County Family Court in Brooklyn, NY, with the help of The New York Foundling, Ms. Mayra Rivera adopted four siblings all at once to ensure that they could remain together as a family under one roof.
Classification of all three tissue microarrays was performed at once to ensure reliability and reproducibility.
