Leadership Team
The ESC Spectrum leadership team’s diverse experience extends across different decades, industries, universities, and roles. What do they all have in common? A passion for helping customers succeed. The ESC Spectrum team helps customers at facilities across the U.S. comply with air emissions compliance regulations, save time and resources, and solve challenging issues so they can maintain focus on their core business.
Meet Our Leadership Team
Senior Leadership Team
Jeff Rabensteine
Rachel Morgan
Michael Viator
Brian Fowler
Deb Stock
Jesse Harlan
Department Managers
Andy Taer
Anna Wilson
Anthony Dougherty
Bob Sackmann
Bobbi Greenwalt
Caroline Arino
Dan Bowles
Dan Waldo
Daniel Frome
Darden Adams
Eric Prater
Donny Klotz
Harvey Fierro
Doug Moreau
Heather Hardy
Jennifer Shelian
Leonard Baughman
Matt Tripepi
Risheng Lin
Tom Barr
Jeramie Pahlman
Maclyn Williams
Michael Johnson
Susan Kennedy
William McKinney
John Ash
Margie DiLoreto
Ramona Fischer
Tanya Circle
From The Source Blog

Air Emissions Calibration Testing: Staying Compliant With Daily and Quarterly Requirements
Accurate air emissions calibration testing is essential for maintaining compliance and ensuring reliable CEMS performance. This blog breaks down daily and quarterly calibration test requirements, explains how offline calibrations are used, and clarifies what causes out-of-control data.

Alliance Technical Group Acquires ESC Spectrum, Cementing Global Leadership in Continuous Emissions Monitoring (CEMS) and Data Acquisition Systems (DAS)
ESC Spectrum is now part of Alliance Technical Group, combining forces to deliver the most comprehensive CEMS and DAS compliance platform in the industry. This strategic acquisition strengthens our ability to serve customers with expanded resources, nationwide support, and end-to-end environmental solutions.

CEMS Probe Maintenance: Extractive vs. Dilution Systems
CEMS probes are the first point of contact with the gas sample line in your emissions monitoring system. Discover why routine maintenance is critical—and how to do it right.