Becoming an accredited fire chief can be tricky, but Onset Deputy Chief Jeffrey Osswald had 26 years of firefighting experience to draw on when he started the months long application process.

An Onset resident, Osswald received his Massachusetts Fire Chief Credential this June. The designation shows he has the required fire service experience, education and certification to serve as a fire chief in the state.

While not yet a requirement for chiefs in Massachusetts, Onset Fire Chief Ray Goodwin said there is pending legislation that would require chiefs to be credentialed if passed.

“If something were to happen to me tomorrow, he’s credentialed and qualified to take over,” said Goodwin. “That ensures good continuity for the department…It demonstrates a level of professionalism and outlines a code of conduct.”

Osswald joined the department in 1990, and he was named deputy chief in 2003. He said there have been many changes in the fire service since then, including an increased focus on training and education.

“I credit the chief for setting the example,” said Osswald. “He’s always staying current with the latest information when it comes to the fire service and the guys see that. It motivates us to be better.”

The Massachusetts Fire Service Commission granted the accreditation, which is an appointed board that established the process for credentialing fire chiefs. All credentialed participants will be required to renew their credentials every three years. The program is open to all members of the fire service serving as chief in a department. Also, any person with the rank of captain or above is eligible to apply.