According to a statement from the police, Stephanie Long, 47, was sentenced at Liverpool Crown Court on 17 November.
The police say Ms Long took more than £200,000 from B&M Waste Services’ accounts between 2016 and 2020.
Having left the company in February 2020, subsequent enquiries revealed that she had been making fraudulent payments to a bank account through her role as Purchase Ledgers Manager, the police say.
Police staff investigator Ben Carpenter said: “This was a significant, devious and protracted crime which placed the business under significant financial pressure, causing distress and worry for everyone employed, and of course for their loved ones.
“Her attempts to abuse her responsible position have been thwarted by this complex investigation, which is a pleasing result to see for all of us.
“That such an impact would be caused to the business was clearly lost on Long, and she will now be left to consider the full consequences behind bars.”
In addition to the sentencing, Merseyside Police say, Ms Long will now be subject to further financial investigations.
B&M Waste Services was founded in 1999 and operates sites across the country, including in Bromborough.
It offers various services, including for waste collection, shredding, and hazardous waste, among other things.
Letsrecycle.com approached B&M Waste Services for comment.