Aftermarket Team
Evan Anderson - Aftermarket Sales Manager
Aftermarket Sales Manager
301.517.6688 | sthaftermarketsales@sthinc.com
As the Commercial Aftermarket Sales Manager at STH, I focus on building long-term partnerships with property management and contractor clients. With more than 20 years of experience in the commercial plumbing industry, I’ve built a reputation for technical expertise, reliability, and integrity.
Over the course of my career, I’ve been involved in every stage of the project lifecycle—from design and construction to aftermarket service. This has given me a comprehensive understanding of how plumbing systems perform over time and what it takes to keep them operating efficiently.
At STH, I bring a solutions-oriented mindset and a deep technical background to support the growth of our aftermarket sales and service team. I’m proud to help foster a culture centered on partnership, performance, and long-term value.
Kelli Swift - Aftermarket Contractor Account Representative
Aftermarket Contractor Account Representative
Joe Enzler - Aftermarket Territory Account Representative
Aftermarket Territory Account Representative
Brandon Tyler - Aftermarket Territory Account Representative
Aftermarket Territory Account Representative
Aftermarket/New Construction Fire Team
Gareth Koogle - STH President and Fire Team Manager
STH President and Fire Team Manager
301.517.6688 | sthaftermarketsales@sthinc.com
I joined STH in 1989 as a part-time service technician while pursuing my education. After finishing college in 1995, I transitioned into a full-time role as a fire support sales representative. Over the years, I advanced through a variety of positions—including inside service and sales support, aftermarket and fire field sales representative, assistant sales manager, and eventually sales manager—which gave me a well-rounded understanding of the business.
In 2001, I became an owner and shortly after, took on the role of president of STH. My hands-on technical background has been a key asset in my approach to executive leadership. Since then, I’ve become the majority shareholder and have focused on growing the company by developing a strong executive leadership team and empowering the teams they lead. This approach has helped ensure STH’s continued success and long-term sustainability.
Today, STH remains on a strong growth trajectory, driven by my commitment to excellence, innovation, and ongoing team development.
Jim Spedden - New Construction Fire Team
New Construction Fire Team
Kyle Grove - New Construction Fire Team
New Construction Fire Team
Mark Barrick - New Construction Fire Team
New Construction Fire Team
Commercial Plumbing Team
Zac Chillemi - Municipal and Industrial Sales Manager
Municipal and Industrial Sales Manager
301.517.6688 | sthcommercialsales@sthinc.com
I joined STH in February 2024, bringing a diverse background in project management and team leadership. My career has spanned multiple areas of the construction industry, including apartment renovations, commercial roofing, electrical work, and general construction and service. These experiences have given me a well-rounded understanding of the industry’s operational demands and challenges.
At STH, I lead our municipal, industrial, and new construction plumbing sales teams. I’m passionate about cultivating strong client relationships and driving successful, results-oriented projects.
Outside of work, I find my greatest joy in spending time with my family, traveling, and staying active. I am a proud Maryland native and University of Maryland graduate, I never miss a chance to cheer on the Terps and the Orioles.
I’m excited to continue building lasting partnerships and supporting the growth and success of STH.
Scot Stewart - Commercial New Construction Account Representative
Commercial New Construction Account Representative
Chad Brashears - Commercial New Construction Plumbing Account Representative
Commercial New Construction Plumbing Account Representative
Ben Carmack - Inside Sales Commercial New Construction Engineering
Inside Sales Commercial New Construction Engineering
Mark Smullen - Commercial Engineering Account Representative
Commercial Engineering Account Representative
Municipal/Industrial Team
Zac Chillemi - Municipal and Industrial Sales Manager
Municipal and Industrial Sales Manager
301.517.6688 | municipal@sthinc.com | industrialsales@sthinc.com
I joined STH in February 2024, bringing a diverse background in project management and team leadership. My career has spanned multiple areas of the construction industry, including apartment renovations, commercial roofing, electrical work, and general construction and service. These experiences have given me a well-rounded understanding of the industry’s operational demands and challenges.
At STH, I lead our municipal, industrial, and new construction plumbing sales teams. I’m passionate about cultivating strong client relationships and driving successful, results-oriented projects.
Outside of work, I find my greatest joy in spending time with my family, traveling, and staying active. I am a proud Maryland native and University of Maryland graduate, I never miss a chance to cheer on the Terps and the Orioles.
I’m excited to continue building lasting partnerships and supporting the growth and success of STH.
Cameron Hallock - Municipal and Industrial Account Representative
Municipal and Industrial Account Representative
Wayne Emerick - Municipal and Industrial Account Representative
Municipal and Industrial Account Representative
Carroll Holmes - Sr. Engineering Representative
Sr. Engineering Representative
Estimating Team
Field Service Team
Cory Lewis - Service/Startup Technician Manager
Service/Startup Technician Manager
Josh Reeder - Service Technician/Trainer
Service Technician/Trainer
Travis Beard - Service Technician/Trainer
Service Technician/Trainer
David Roller - Service Technician/Trainer
Service Technician/Trainer
Justin Conley - Service Technician/Trainer
Service Technician/Trainer
Tyler Harrison - Service Technician/Trainer
Service Technician/Trainer
Jayvon McIntosh-Williams – Apprentice Tech
Apprentice Tech
Brett Mills - Startup Service Technician
Startup Service Technician
Preventative Maintenance Team
Bill Wendorf - Service Department General Manager
Service Department General Manager
I’m a seasoned service industry leader with over 20 years of experience, driven by a commitment to operational excellence and people-first leadership. My career began in appliance services and has since evolved into a leadership role in the pump industry, all guided by one core principle: empower people to perform with purpose—in the field, in the shop, and in life.
As Service General Manager at STH, I oversee daily operations, shape long-term service strategy, and lead a high-performing team focused on delivering reliable, customer-first solutions. I bring hands-on experience and a growth-oriented mindset to every challenge, with an emphasis on accountability, efficiency, and trust.
I also serve as Vice President of the Mid-Atlantic Chapter of the Electrical Apparatus Service Association (EASA), where I support the development of industry standards, encourage collaboration, and help grow the next generation of service professionals.
Outside of work, I enjoy spending time with my wife of over 20 years and our two children. We love hosting cookouts, being outdoors, and staying active in the community. I also play competitive softball and serve on the board of my local league, where I help organize, manage, and grow the program for players of all levels.
Ean Anderson – Preventative Maintenance Development Rep
Preventative Maintenance Development Rep
Gunnar Griffith - Preventative Maintenance Service Technician
Preventative Maintenance Service Technician
Greg Morales - Preventative Maintenance Service Technician
Preventative Maintenance Service Technician
Service Support Team
Bill Wendorf - Service Department General Manager
Service Department General Manager
301.517.6880 | sthservice@sthinc.com
I’m a seasoned service industry leader with over 20 years of experience, driven by a commitment to operational excellence and people-first leadership. My career began in appliance services and has since evolved into a leadership role in the pump industry, all guided by one core principle: empower people to perform with purpose—in the field, in the shop, and in life.
As Service General Manager at STH, I oversee daily operations, shape long-term service strategy, and lead a high-performing team focused on delivering reliable, customer-first solutions. I bring hands-on experience and a growth-oriented mindset to every challenge, with an emphasis on accountability, efficiency, and trust.
I also serve as Vice President of the Mid-Atlantic Chapter of the Electrical Apparatus Service Association (EASA), where I support the development of industry standards, encourage collaboration, and help grow the next generation of service professionals.
Outside of work, I enjoy spending time with my wife of over 20 years and our two children. We love hosting cookouts, being outdoors, and staying active in the community. I also play competitive softball and serve on the board of my local league, where I help organize, manage, and grow the program for players of all levels.
Cory Lewis - Service/Startup Technician Manager
Service/Startup Technician Manager
Lindsay Phillips - Lead Service Administrator
Lead Service Administrator
Danielle OReilly - Service Procurement Specialist
Service Procurement Specialist
Kayla Morgan - Service Procurement Specialist
Service Procurement Specialist
Renee Wickham - Startup Admin Coordinator
Startup Admin Coordinator
Shop Service Team
Bill Wendorf - Service Department General Manager
Service Department General Manager
I’m a seasoned service industry leader with over 20 years of experience, driven by a commitment to operational excellence and people-first leadership. My career began in appliance services and has since evolved into a leadership role in the pump industry, all guided by one core principle: empower people to perform with purpose—in the field, in the shop, and in life.
As Service General Manager at STH, I oversee daily operations, shape long-term service strategy, and lead a high-performing team focused on delivering reliable, customer-first solutions. I bring hands-on experience and a growth-oriented mindset to every challenge, with an emphasis on accountability, efficiency, and trust.
I also serve as Vice President of the Mid-Atlantic Chapter of the Electrical Apparatus Service Association (EASA), where I support the development of industry standards, encourage collaboration, and help grow the next generation of service professionals.
Outside of work, I enjoy spending time with my wife of over 20 years and our two children. We love hosting cookouts, being outdoors, and staying active in the community. I also play competitive softball and serve on the board of my local league, where I help organize, manage, and grow the program for players of all levels.
Warehouse/Inventory Team
Cameron Harley - Inventory Control Specialist
Inventory Control Specialist
Sales Support Team
Brittney Stevenson - Assistant Project Manager
Assistant Project Manager
Mike Elicker - Procurement Coordinator
Procurement Coordinator
Finance Team
Matt Calogero - Contracts Officer and NetSuite Administrator
Contracts Officer and NetSuite Administrator
Shelley Czach - Accounting Administrator
Accounting Administrator
Executive Team
Gareth Koogle - President
President
I joined STH in 1989 as a part-time service technician while pursuing my education. After finishing college in 1995, I transitioned into a full-time role as a fire support sales representative. Over the years, I advanced through a variety of positions—including inside service and sales support, aftermarket and fire field sales representative, assistant sales manager, and eventually sales manager—which gave me a well-rounded understanding of the business.
In 2001, I became an owner and shortly after, took on the role of president of STH. My hands-on technical background has been a key asset in my approach to executive leadership. Since then, I’ve become the majority shareholder and have focused on growing the company by developing a strong executive leadership team and empowering the teams they lead. This approach has helped ensure STH’s continued success and long-term sustainability.
Today, STH remains on a strong growth trajectory, driven by my commitment to excellence, innovation, and ongoing team development.
JD Slough - CFO
CFO
As a teenager in the late 1990s, I began my accounting career while working at my father's CPA firm. A lifelong passion for accounting along with the broader realm of business operations evolved from that financial basis. In 2005, I graduated from West Virginia University with a Bachelor of Science in Accounting and a Master's Certificate in Forensic Accounting.
In 2012, I became a Controller at Shafer, Troxell & Howe (STH). In 2018, I was privileged to be appointed the Chief Financial Officer and a minority shareholder in the company. As the fractional CFO for Cougar USA, I am delighted to have contributed to the expansion of STH's back-office capabilities, especially by implementing our shared services model.
Becoming an owner at STH has been a very important step in my life. I am very proud to help create a work environment where our team feels valued and supported.
Outside of work, I am an active member of my local church and enjoy coaching my kids' youth sports teams. Whether at work or in the community, I am driven by a passion for building strong foundations—financially, professionally, and personally.
Jeff Russell - Vice President and Sales Team Manager
Vice President and Sales Team Manager
As a principal and Vice President of Sales at STH since 2001, I’ve had the privilege of leading our four sales teams while collaborating with the ownership group, executive team, and sales managers to ensure we meet—and exceed—our strategic sales goals. One of my proudest contributions has been developing our commercial aftermarket sales and service program, which continues to be a key driver of our success.
I take immense pride in the growth of STH, the dedication of our employees, and the trusted partnerships we’ve built with manufacturers over the last 52 years.
Before joining STH, I spent 22 years in the petroleum equipment industry. My career included roles as a distributor and as a District and Regional Sales Manager, eventually becoming Vice President of Sales and Marketing at Xerxes Corporation—a national manufacturer of fiberglass underground storage tanks. In that role, I oversaw a team of 10 sales managers, 150 distributors, and managed major national and regional oil company accounts.
I’m a graduate of Baltimore Polytechnic Institute and proudly served in the U.S. Army as an infantry sergeant in the 25th Infantry Division for three years. I later earned a B.S. in Marketing from Towson University.
In my free time, I enjoy hunting, fishing, traveling, good food, and—most of all—spending time with family and friends. Life is a wonderful adventure.
Ciji Masser - Operations Manager
Operations Manager
As Operations Manager at STH, I oversee the alignment of systems, people, and processes to ensure projects are delivered efficiently, profitably, and on schedule. I am accountable for driving operational excellence from quote follow-up to close-out, supporting revenue goals, accurate WIP forecasting, and smooth customer experience. Since joining STH in 2018 as a Project Coordinator, I’ve held roles in project management and sales support leadership, ultimately joining the executive team in 2022. Before STH, I worked in Residential HVAC, where I coordinated installs, permits, and later led service and startup operations. I hold a BA in Business Administration with a concentration in Human Resources from Hood College and am currently pursuing a Director of Operations certification, which I’ll complete in August 2025.
One of my proudest accomplishments was leading the 2024 NetSuite ERP relaunch, where I collaborated with our support team to restructure departments, streamline workflows, and align tools for better forecasting and cross-team visibility. The result was more efficient support for our sales staff, stronger process discipline, and improved clarity across the company. I focus on building high-performing teams, eliminating friction in operations, and ensuring our marketing strategy aligns with sales and revenue conversion. My leadership philosophy is grounded in empathy, preparation, and a belief in empowering others, guided by my values of connection, growth, purpose, and collaboration.
Outside of work, I spend my time in the garden, surf fishing, and being with my family. My vision is centered on building a life of freedom and fulfillment, where work supports our dreams, not the other way around. I’m most often described as dependable, calm under pressure, and someone who brings clarity to complexity. Whether I’m improving internal systems or managing a field team, I lead with both structure and heart.
Bill Wendorf - Service Department General Manager
Service Department General Manager
I’m a seasoned service industry leader with over 20 years of experience, driven by a commitment to operational excellence and people-first leadership. My career began in appliance services and has since evolved into a leadership role in the pump industry, all guided by one core principle: empower people to perform with purpose—in the field, in the shop, and in life.
As Service General Manager at STH, I oversee daily operations, shape long-term service strategy, and lead a high-performing team focused on delivering reliable, customer-first solutions. I bring hands-on experience and a growth-oriented mindset to every challenge, with an emphasis on accountability, efficiency, and trust.
I also serve as Vice President of the Mid-Atlantic Chapter of the Electrical Apparatus Service Association (EASA), where I support the development of industry standards, encourage collaboration, and help grow the next generation of service professionals.
Outside of work, I enjoy spending time with my wife of over 20 years and our two children. We love hosting cookouts, being outdoors, and staying active in the community. I also play competitive softball and serve on the board of my local league, where I help organize, manage, and grow the program for players of all levels.