The brief ceremony was witnessed by Chief Justice, David Maraga and attended by Attorney General, Githu Muigai among others.
Wabukala was nominated by President Uhuru Kenyatta last year, after the resignation of the then EACC chairman, Philip Kinisu who was forced to step down after he was linked to a company mentioned in the National Youth Service scandal.
Kinisu’s family firm Esaki limited supplied goods worth Ksh35m to NYS over a period of three years while it was under investigation arousing conflict of interest from Kinisu.
Wabukala's candidature for the EACC chairman position was approved last week, clearing the last hurdle for him to assume office.
After being sworn in, Wabukala called upon Kenyan to take an active role in the fight against graft.
"I call upon Kenyans to join us in the war against graft, not be part of the problem," he said as reported by a local daily.
The retired bishops acknowledge it will take time to slay the dragon of graft but he was confident it would be effectively dealt with in the test of time.
"It will take time but we will come out victorious. Our leaders, such as governors and parastatal heads, will have to be accountable for their departments and areas of service because we all have to be responsible."
Mr Wabukala also called for cooperation from relevant institutions in order for the fight against graft to be won.
"Fighting corruption should not be left entirely to the commission. Cabinet secretaries, principal secretaries, executive officers, governors and accounting officers must take responsibility and should also be held answerable for what happens in their ministries, departments and counties," the man of God said.
Wabukala takes the mantle of one of the most scandalous and ‘haunted’ government parastatal, over half of its chairmen have been forced to resign for one reason or another in its short colorful history.
Wabukala will need all the prayers, Holy Spirit and God's grace to weather the storm that is coming his way.