Shannon has been employed in the water and wastewater industry since 1992. He was a Roberts Creek Water District board member from 2007-2012 and the past president of the Umpqua Basin Operators Section of the PNCWA.

Shannon has the following certifications:

• Oregon DEQ Wastewater Collections II
• Oregon DEQ Wastewater Treatment I
• Oregon BCD OIC-Inspector
• Oregon BCD PI-Plumbing Inspector
• Oregon DEQ Asbestos Worker