KKR has hired Rothschild to manage the sale, which could value Northgate Public Services (NPS) at around $600m, said Reuters, citing two sources familiar with the situation.
NPS is expected to post a turnover of £195m and an EBITDA of £50m in the fiscal year to end-April 2015.
KKR bought Northgate Information Solutions in a £593m take-private deal in 2008.
Meanwhile, KKR is looking to float Acciona Energia International and has hired JP Morgan and Goldman Sachs to manage the IPO.
Earlier this month KKR-backed car dealer Rundong Auto Group raised $124m at its Hong Kong Stock Exchange IPO.
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