CLARIFIERS - Key Persons


Bill Cantwell - President

Job Titles:
  • President

Bill Driscoll


Bob Mack


Bob Swedberg - Treasurer

Job Titles:
  • Treasurer

Carl E. Janson - President

Job Titles:
  • President

Clark Tuck - President

Job Titles:
  • President

Debby Patton

Job Titles:
  • Admin. Asst

Dennis Vigliotte


John K. Esler - President

Job Titles:
  • President
  • Founder and President of CPE Services, Inc
Experience John Esler is the founder and President of CPE Services, Inc & co-founder and President of Clarifiers, Inc. His experience includes over thirty years in general construction, consulting engineering, and operator training and technical assistance. John has served as the Design Associate on civil engineering projects, Project Manager on general construction projects, director of NYS-DEC's certification, training and technical assistance program, and director of O&M on a large international wastewater treatment project. While with NYS-DEC, Mr. Esler was a contributor to the "Ten States Standards", a peer-reviewer and contributor to the CSU/Sacramento "Operator Training" series, as well as to the EPA manual on "Retrofitting POTW's". He was also a member of the Beta team for its computer version. Education B. Civil Engineering, Manhattan College Adjunct Professor, Rensselaer Polytechnic Institute, 1990 - 2000

John Spielman


Mark Koester

Job Titles:
  • President / Koester Associates, Inc.

Mark Sampson - VP

Job Titles:
  • Vice President

Mark Weller


Peter Pastore - President

Job Titles:
  • President

Peter Radosta


Rick Nash


Tom Schell