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

President
Jeff joined ESC Spectrum in 1988 and has served in many capacities including Engineering, VP of Marketing & Sales, VP of Customer Support, VP of Operations, and Executive Vice President. His diverse experience has led to a rich understanding of the regulatory landscape and business challenges that our customers face. He has served the industry through participation in a variety of ASME committees and EPRI task groups. Jeff graduated from The University of Tennessee in 1990 with a B.S. in Electrical Engineering.

Rachel Morgan

Executive Vice President
Rachel joined ESC Spectrum over two decades ago as a Software Support Specialist. She has assumed many roles over the course of her career, including Director of Customer Services and VP of Development and VP of Customer Services. She currently serves on the as the Executive Vice President, and oversees Support, CEMS Services, CEMS Manufacturing, CEMS Training, Software Implementation & Support and Software Development departments. Rachel graduated from the University of Tennessee in 1999 with a M.S. in Computer Science.

Michael Viator

Vice President, Sales and Marketing
Michael joined ESC Spectrum in 2016 as the Director of Sales, Business Development and Marketing. He brings over 30 years of business development experience in the software, instrumentation and automation field. He has vast expertise that includes leadership roles in capital project management, global sales and environmental regulation and reporting.  He has an MBA from Rice University, a Business Management degree from University of Texas - Austin, and an Industrial Technology degree from Sam Huston State University. 

Mark Shell

Chief Technology Officer
Mark has been with ESC Spectrum for almost 40 years and has been involved in many roles. He was ESC Spectrum’s first Project Implementation Engineer. He wrote most of the code used in the 8800 datalogger. and designed the hardware for both the 8800 and 8816 Data Controller. As Chief Technology Officer, he guides the technical direction of the company, and oversees StackVision Software Development, Controller Development, and Product Management. Mark graduated from the University of Tennessee with a B.S. in Electrical Engineering in 1982 and M.S. in Electrical Engineering in 1986.

Brian Fowler

Director of Operations
During his decade plus tenure at ESC Spectrum, Brian has held a number of different positions giving him a unique perspective. He began in Software Implementation before promoting to Director of Engineering and Marketing, a role in which he oversaw all engineering operations and managed promotional activities. In his Operations role, he oversees the Sales Support, Project Engineering, Customer Service (Tier 3), and Controller Production departments. Brian graduated from the University of Tennessee in 2001 with a B.S. in Electrical Engineering and an M.B.A. in 2011.  

Deb Stock

Director of Human Resources
Deb brings over 20 years of Human Resources experience to ESC Spectrum. Prior to joining the team, Deb worked in a variety of industries which include manufacturing insurance, banking and healthcare. She has experience in strategic human resource planning, employee engagement, performance management and more. Deb holds a Master's in Human Resources from Penn State University and two HR certifications: Senior Professional Human Resources (SPHR) and Senior Certified Professional in Human Resources (SCP-HR).

Jesse Harlan

Director of Finance and Administration
Jesse joined ESC Spectrum as the Director of Finance & Administration in 2019. He is responsible for Finance, Accounting, Facilities, and IT Support. Prior to ESC Spectrum, Jesse led teams in accounting and finance in diverse areas of Exelon Corporation for about thirteen years. Jesse is a C.P.A. and graduated from the University of Baltimore in 2003 with a B.S. in Finance and obtained an M.B.A. with an Accounting specialization from Loyola University Maryland in 2006.

Department Managers

Andy Taer

Business Development Team Leader
Andy joined ESC Spectrum’s Business Development team in 2016 and was later promoted to Business Development Team Leader. He brings over 30 years of Business Development experience in the petroleum, enterprise software, and environmental industries. Andy has B.S. and M.S. degrees in Geology from the State University of New York at Oneonta and Bowling Green State University, respectively.

Anna Wilson

Corporate Marketing Manager
Anna Wilson joined ESC Spectrum in 2020 as a Corporate Marketing Manager with over 20 years of experience in the energy industry. She is well-versed in branding, leadgen, communications, GTM strategy, content marketing, and project management. Previously, Anna served as the Corporate Marketing Manager for American Innovations, a supplier of solutions for the oil and gas industry. She spent a decade as a music journalist for magazines, the Austin-American Statesman and Riverfront Times. She graduated with a BA in English Literature from Washington University and a Masters in Literature from University of Missouri-Columbia. Anna is a Missouri native and an honorary Texan.

Anthony Dougherty

Senior R&D Manager
Anthony has been with ESC Spectrum for 12 years and has worn many hats during that time including Project Engineer, StackVision Business Analyst, StackVision Development, Customer Success Engineer, Senior Product Engineer, sole developer of DLSuite and now the Senior R&D Manager here at ESC Spectrum. As Senior R&D Manager Anthony reports directly to the Chief Technology Officer of ESC Spectrum and is responsible for all development efforts related to the 8864. Anthony is responsible for and is heavily involved in all development aspects of the 8864. Anthony Graduated from the University of Tennessee with a B.S. in Electrical Engineering in 2000.

Bob Sackmann

Field Service Manager
Bob joined ESC Spectrum following the acquisition of Monitoring Solutions Inc. in December of 2021. He began his employment with Monitoring Solutions as a Field Service Engineer in 2008 before being promoted to Field Services Manager of the Indianapolis office in 2011. Prior to joining Monitoring Solutions, Bob was a Maintenance Supervisor for the Major Airline, ATA, for 26 years. Bob graduated from Vincennes University, majoring in Aviation Maintenance Technology. He received an A.S. Degree and an Aircraft Mechanics License in 1981.

Bobbi Greenwalt

CEMS Integration Manager
Bobbi started in electric power generation industry 15 years ago as an Instrument and Control Specialist for Minnesota Power. She advanced to CEMS Lead Administrator and provided leadership and support to Minnesota Power’s thermal generation CEMS technicians to ensure accurate and reliable CEMS operations. Bobbi came to ESC Spectrum as a Proposal Engineer and has since been promoted to CEMS Integration Manager. She now oversees all CEMS operations at ESC Spectrum. Bobbi holds an A.A.S in Electrical and Industrial Automation and a B.A.S. in Applied Engineering.

Caroline Arino

Inside Business Development Sales Manager
Caroline joined ESC Spectrum in 2014 with over 15 years of Sales and Customer Service experience. As the Inside Business Development Sales Manager, she assists StackVision and Prism users with software, hardware, and CEMS maintenance renewals. Caroline has a wealth of knowledge regarding products and services that enhance the value of having a DAS. Caroline graduated from UTPB with a B.A. in Psychology and a Minor in Sociology. Caroline is also a key member of ESC Spectrum's Employee Activity Committee.

Daniel Frome

Senior Systems and Database Administrator
As a Senior Systems and Database Administrator, Daniel Frome manages hosting, server management, FlexReports, SQL server and serves as a StackVision Business Analyst. He is a subject matter expert for many products and a “master problem solver” who provides guidance concerning development and support issues. Daniel earned his B.S. in Computer Science from Maryville College with a minor in Economics and Statistics and an M.B.A. from East Tennessee State University (ETSU), where he met his future wife. Daniel is also is a working Dad who helps coach baseball and basketball for both of their children.

Donny Klotz

Technical Sales Manager
Donny joined ESC Spectrum in April of 2020 as a Business Development Manager and has since been promoted to Technical Sales Manager. Donny brings 20 years of CEMS and process control experience in industrial and research applications. He began his career as an Environmental Scientist for the State of Indiana, assigned to special projects for the U.S. Environmental Protection Agency and the U.S. Department of Homeland Security. Donny graduated from Indiana University in 1999 with a B.S. in Environmental Affairs & Policy.

Eric Kok

Sr. CEMS Integration and Field Service Manager
Eric has been with Control Analytics since 2014 and has served as Integration Production Manager, Service Manager, Operations Manager, and General Manager. He was promoted to Senior Manager of CEMS Integration and Field Service following ESC Spectrum's acquisition of Control Analytics. Prior to his employment with Control Analytics, Eric held numerous Operations Management roles with Siemens and Tyco Electronics/AMP. He has an Engineering degree from Penn State University and an M.B.A. from the University of Pittsburgh.

Eric Prater

Manager of Engineering
Eric joined ESC Spectrum over a decade ago as a Systems Implementation Engineer. He has since worked as an Engineering Manager and currently serves as the Manager of Engineering. In his roles, he has implemented numerous StackVision Data Acquisition Systems of all sizes, including fleet wide installations. Eric’s previous experience includes programming at many industrial automation integration providers. He graduated from the University of Tennessee in 1999 with a B.S. in Industrial Engineering. 

Harvey Fierro

Manager of Customer Services
Harvey joined ESC Spectrum in 2013 as a System Support Engineer, then was promoted to Manager of the Customer Services group in 2018, a role in which he manages a staff of 16 customer support and reporting team members. Harvey has over 25 years of experience in the CEMS environment in various projects and roles. Before joining ESC Spectrum, he was a Field Service Representative with Teledyne Monitor Labs for over 20 years.

Jennifer Shelian

Sr. Business Systems Manager
Jennifer joined ESC Spectrum in 2002 after graduating from Lewis University with a BS in Computer Science and a minor in Mathematics. She resides in Tennessee and hails from outside of Chicago. Jennifer began working in Customer Support and has worn many hats including reporting specialist, system implementation engineer, and project manager. Her experience lends the perfect backdrop to her current role as the Business Systems Manager.

John Ash

Business Development Team Leader
John joined ESC Spectrum in 2011 as a Business Development Manager with 20 years of business development and revenue growth experience and ten years of experience with DAS and CEMS projects. Throughout his career, he has focused on environmental air compliance data management and reporting software solutions for industrial and energy-related industries across the U.S. John graduated from Indiana University in 2001 with a B.S. in Business Marketing.

Mark Gerhauser

IT Manager
IT Manager Mark Gerheauser joined ESC Spectrum with a wealth of experience in technology systems. While in the Army, he served as an electronic warfare technician in Germany, Turkey, Okinawa and Korea. He has close to three decades of experience with Cisco network, security and voice system engineering. In his previous role, he managed network/voice systems for a large hospital and doctor clinic system in Houston, Texas. Mark, a father of two, enjoys spending time with his grandchildren and performing with his band.

Shaun Ellis

Senior Product Manager
Shaun Ellis is a Senior Product Manager at ESC Spectrum with over two decades of Continuous Emissions Monitoring Systems (CEMS) experience. Shaun is known for resolving tough questions and supporting customers to the fullest. His customer-centered point of view informs software development for many different products. Shaun also was the lead business analyst over the design, development, and installation of QAInsight. Shaun started his career at ESC Spectrum in 1999 after receiving his Associate's degree in Electronics from the Tennessee Institute of Electronics. Shaun is passionate about customers' needs when using ESC Spectrum’s products.

Leonard Baughman

Technical Support Manager
Leonard joined ESC Spectrum in January of 2022 as Manager of Technical Support Services. Leonard is a Registered P.E. in Indiana. Prior to Monitoring Solutions becoming part of the ESC Spectrum family, he worked at Monitoring Solutions for 25 years. Leonard held various positions while at Monitoring Solutions and has most recently provided Technical Support for all of the departments in the company. Leonard Graduated from Rose Human Institute of Technology with a B.S. Mechanical Engineering. Before Monitoring Solutions, Leonard worked at Enviroplan in various roles, including Project manager, R&D Manager, and Director of R7D.

Ramona Fischer

Accounting Manager
Ramona Fischer began with ESC Spectrum in 1989 and worked for over a decade before leaving to be a full-time mom. After returning to the workforce, she was an Accountant and Office Manager for a structural engineering firm and served as a Director's assistant for the Escambia County School District. Ramona returned to the company in 2013 as an Accountant, and is now the Accounting Manager. She earned a BS in Accounting with a minor in Finance from The University of West Florida in 1987.

Tanya Circle

Human Resources Manager
Tanya Circle joined the ESC Spectrum team as an HR Manager in 2021 after just under a decade of experience in the Human Resources field. She obtained her Master of Science in Industrial and Organizational Psychology in 2015 from Emporia State University in Emporia, Kansas (Go Hornets!) and currently holds a Professional in Human Resources (PHR) certification. Tanya has a passion for assisting others and supporting positive, engaging work cultures.

Margie DiLoreto

Sr. Accounting Manager
Margie worked in healthcare for more than twenty years before coming to ESC Spectrum in December of 2019. She graduated with her Master’s in Accounting from the University of West Florida and has extensive experience building teams of high performers in a dynamic industry, which included multiple software conversions, acquisitions, and numerous changes in regulatory and reporting requirements. Margie’s goal is to perfect the efficiencies of work flows and processes at ESC Spectrum, while developing the staff to better serve their internal and external customers.

Risheng Lin

Software Development Manager
Before coming to ESC Spectrum to serve in the Software Development Manager role, Risheng had extensive experience delivering high quality enterprise and cloud software products in the fast-paced technology industry. Risheng manages all aspects of the development lifecycle (SDLC) from design through customer relationship to ensure achievement of business objectives. Risheng graduated from Shanhai Jiao Tong University with a B.S. in Business/Managerial Economics. He then obtained a M.S. in Computer Science and a Ph.D. in Mechanical Engineering from The University of Toledo.

Tom Barr

Engineering and Production Manager
Tom joined ESC Spectrum as CEMS Integration Manager/Indianapolis in January of 2022. Prior to Monitoring Solutions becoming part of the ESC Spectrum family, he spent 25 years working for Monitoring Solutions and held various positions, including managing service & production, before becoming Engineering & Production Manager in 2013. Tom brings over 28 years of CEMS experience to ESC after initially being hired as a service technician at Enviroplan Inc in 1993, then becoming a Project Manager. He also worked in multiple engineering & management roles with previous employers. Tom has an associate’s degree in electronics from Ivy Tech.

Join the ESC Spectrum Team!

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