But Jacobs said that his lawyer was mistaken in making that allegation.
The evidence at the heart of the postponement was a letter from a former Uber security analyst's attorney to an Uber lawyer.
The hearing instead quickly turned into a forum raising more questions about Uber's ethics and corporate culture.
Jacobs was part of the "Strategic Services Group" at Uber, although Bloomberg says the team has now been renamed.
In a dramatic courtroom showdown on Tuesday in the bitter trade-secret dispute between Waymo and Uber, a visibly angry USA federal judge accused Uber's lawyers of withholding evidence.
Prosecutors had informed U.S. District Judge William Alsup that they were in contact with him during their own criminal investigation into Uber's alleged thefts.
Uber has denied using Waymo trade secrets and rejects the financial damages claim, but has fired the leader of its autonomous vehicle division, who is alleged to have stolen Waymo data before joining Uber.
Alsup expressed his frustration with the company again on Tuesday.
Former Uber employee and whistleblower Richard Jacobs testified today that Uber's marketplace analytics team was tasked with unearthing information about competitors, including trade secrets and code, according to Gizmodo.
Jacobs said he learned of this activity through discussions at Uber with his manager and other colleagues.
Waymo asked the court on Monday to postpone the start of the trial, which was set to begin next week, saying Uber had concealed the memo.
Waymo said that it had learned about the letter last week from the Department of Justice, according to MSNBC. The lawyer also argued that the company used secretive communications channels for employee safety reasons.
"We're going to have to put the trial off", Alsup said.
Waymo sued Uber in February, claiming that former Waymo executive Anthony Levandowski downloaded more than 14,000 confidential files before leaving to set up a self-driving truck company, called Otto, which Uber acquired soon after.
In a statement defending itself, Uber pointed to Jacobs' testimony the he wasn't aware of the company stealing any of Waymo's trade secrets.
The latest bombshell to drop on Uber came as the company tried to complete a $10 billion sale of its privately held stock.