The phrase "assigned after" is correct and usable in written English.
It can be used to indicate that something is designated or allocated following a specific event or time.
Example: "The tasks will be assigned after the meeting concludes."
Alternatives: "designated after" or "allocated after".
The "use by date" assigned after the test was 9 February 2016.
Mr. Mawn most recently headed the bureau's Boston office, where he was assigned after a former star agent was charged with racketeering and obstruction of justice.
Penalties will be assigned after the third and final phase of the company's non-jury trial, which starts on Tuesday in New Orleans.
That's where Chaisson was assigned after leaving a bank job to enlist when he was 17 – with his father's permission, since he was underage.
The peoples and nations now released from imperial captivity were each to receive their own spaces, assigned after careful specialist attention to history, geography, language and other relevant considerations.
When properly assigned after conversations with the patient about what would be wanted in the way of treatment under various circumstances, a health care proxy can speak for the patient.
Two former Federal Emergency Management Agency officials assigned after Hurricane Katrina to supervise a supply base camp in New Orleans have pleaded guilty to charges of trying to bribe a contractor.
Walking through the Gardens area, one quickly sees that tradition is celebrated, as each street bears both its original name and the number it was assigned after Queens became part of New York City — a rarely seen quirk.
When he met Potanin, Prokhorov was working at the ailing International Bank for Economic Cooperation, where he had been assigned after college and where he'd quickly earned a series of promotions.
The article also referred incorrectly to the church in Rome to which Cardinal Bernard F. Law was assigned after he left Boston following accusations that he had kept abusive priests working in parishes.
Carter Pigza talks relentlessly, rarely stops to listen, and as coach for a Police Athletic League baseball team -- the community service he was assigned after his last arrest -- chews his players out as though he came from the Bobby Knight school of management.
