Amey has secured contracts totalling £113m to deliver street cleansing and road maintenance services on behalf of Liverpool City Council for nine years.
The council says the deal represents a saving of £33m on its previous arrangements.
The work was previously done by Enterprise-Liverpool, a joint venture between Enterprise and Liverpool City Council, which had a 10 year contract.
Amey, which completed the acquisition of Enterprise in April, won the work following a competitive tendering process.
Staff are expected to transfer from the Enterprise-Liverpool to Amey but it is not yet clear how many and whether there will be any redundancies.
Amey has made a commitment to create 140 apprenticeships over the life of the nine year streetscene agreement, giving unemployed people the chance of on the job training and a career.
In addition to highway maintenance and street cleaning, the contract covers street lighting, inspection and maintenance of roads, gully cleaning and gritting, as well as improved cleansing, fly tipping removal, tackling graffiti and fly-posting, highway weed control and environmental education.
Cllr Tim Moore, Liverpool City Council cabinet member for climate change and transport, said: "Keeping our roads well maintained and streets clean are a major priority, but cuts in funding from central government mean it is more important than ever that we receive the best possible value for money service from our contractors.
"The millions of pounds we are saving each year will enable us to protect other vital services and shield the most vulnerable as much as we possibly can."
Amey has committed to spending 90% of its budget locally, with particular support for small and medium enterprises.
Chief executive Mel Ewell said: "Liverpool is one of the UK's most distinctive cities and our vision for the service is to deliver a best value and innovative approach to improving the reliability of the road network and the cleanliness of the streets."
The new contracts will start on 1 July.