Niki Clemo, who is now Chief Executive of the Slough Children's Services Trust, was given the honour for services to children.
She and her team were instrumental in taking the Council's safeguarding arrangements from "˜inadequate' to "˜good' in less than two years in 2014. It was the first time a local authority had improved by two levels.
Niki Clemo said: "On behalf of Cambridgeshire County Council's social workers and staff, elected members, partners and stakeholders, I am delighted to accept this OBE.
"Working in Cambridgeshire gave me the opportunity to promote the social work profession as one that should be celebrated and valued "“ and it's this recognition of our profession that makes this OBE so special."
Adrian Loades, Cambridgeshire County Council's Executive Director for Children, Families and Adults, added: "I am delighted that Niki has been honoured in this way. She was instrumental in transforming Cambridgeshire's safeguarding arrangements.
"Her relentless hard work, passion and commitment to the value of social work were a major factor in helping the Council become the first local authority in the country to progress from the lowest Ofsted category to the second highest in less than two years. This award is richly deserved "“ not only for Niki but also for the dedicated colleagues who worked with her in Cambridgeshire to achieve the best possible outcomes for our young people."