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About MayoSeitz Media

Founded in 1997 by Ray Mayo and Jon Seitz, MayoSeitz Media is an independent agency that specializes in paid media solutions, handling every aspect from strategy and execution to measurement. What our clients tell us they appreciate most is our ability to seamlessly collaborate, deliver cutting-edge media programs, and provide unmatched service that drives results.

 

We are the perfect-sized agency—small enough to be incredibly agile and responsive yet equipped with the resources of a larger agency to craft bold, results-driven strategies. Our team of channel experts works across all platforms, customizing the ideal media mix to maximize success and ROAS for every client.

 

In a media landscape that changes at lightning speed, marketers need a partner who not only adapts quickly but also stays ahead of the curve. That’s why we’ve built a culture rooted in data-driven decisions, relentless innovation, and a future-focused mindset to deliver superior returns.

Meet Our Leadership Team

Media that moves business forward. At MSM, you’ll work directly with senior leadership to craft smart, strategic, and creative media solutions that deliver results—and relationships that last.

Ray Mayo portrait

RAY MAYO

Chief Executive Officer

Ray Mayo

Chief Executive Officer


Under co-founder & CEO Ray's leadership, MayoSeitz Media has grown into one of the top independent media agencies in the country. Ray was a legend long before MSM opened its doors, managing $100MM+ media departments at Earle Palmer Brown/Philadelphia and GKV in Baltimore, among the mid-Atlantic region's largest agencies. Fully engaged on all initiatives, he lives, eats, and breathes strategic success, which filters down to every MSM team member.

Jon Seitz portrait

JON SEITZ

General Manager

Jon Seitz

General Manager


Our founding partner brings a unique perspective and superbly honed skills to MayoSeitz, with experience in both agency management and sales. As General Manager, Jon is head coach of a championship team, fine-tuning the entire operation into a well-oiled machine. Jon is a respected mentor and all-around great guy who volunteers his time and talent for several committees, including the 4As and the Philadelphia Ad Club.

Mary Tyrrell portrait

Mary Tyrrell

President and Chief Operating Officer

Mary Tyrrell

President and Chief Operating Officer


Not just a talented media strategist, Mary is also a master juggler—leading the MayoSeitz multi-disciplinary team. She never sits still and knows how to pivot—driving innovation and evolution in an industry that changes practically by the minute. Mary is intimately engaged in media strategy development and works tirelessly towards client success with effective, economical, and creative media management.

Jessica Rosenthal portrait

JESSICA ROSENTHAL

SVP, Director of Video & Audio

Jessica Rosenthal

SVP, Director of Video & Audio


Jessica leads the Video and Audio Team with creativity, strategy, and deep industry expertise. A New York City media veteran, she's delivered standout work for national brands like Got Milk? and Ace Hardware, and is known for forging strong partnerships and crafting smart, effective media solutions.

Adam Yansick portrait

ADAM YANSICK

SVP, Director of Media & Analytics

Adam Yansick

SVP, Director of Media & Analytics


Adam's been a key player on the MayoSeitz team for many years and has excelled at every task he's tackled. Driven, smart, and tenacious, he's got all the right skills and priceless experience to lead the Insights team, which has grown exponentially under his leadership. He oversees Analytics with the mind of an engineer and brings his razor-sharp instincts to planning, strategy, and squeezing the data for every drop of ROI.

Cathy Mazurek

CATHY MAZUREK

SVP, Director of Finance

CATHY MAZUREK

SVP, Director of Finance


Cathy brings 30+ years of combined experience in public accounting and within the IPG agency network. At MSM, she leads all financial operations including billing, vendor payments, and reporting. Her experience includes managing both large and small teams for regional, national, and international clients. Cathy is known for her commitment to training, mentoring, and collaboration among agency teams and clients.

Erin Bernethy portrait

ERIN BERNETHY

VP, Director, Integrated Media Strategy

Erin Bernethy

VP, Director, Integrated Media Strategy


Erin oversees media strategy for a mix of national and regional brands at MayoSeitz Media. For her, it's about seamlessly connecting brands with consumers' media journeys, from traditional to digital. She is invigorated by research and data, and she uses this passion to execute strategic, results-driven media campaigns.

Lisa Volpe portrait

LISA VOLPE

Director, Talent & Operations

Lisa Volpe

Director, Talent & Operations


A team is only as good as its people, and Lisa is obsessed with recruiting the very best. She's our HR guru, leveraging over 10 years' experience in a wide range of industries. Lisa knows how to keep talent flowing in an industry with legendary HR demands. She captains all aspects of HR—recruiting, onboarding, employee relations, performance management, payroll, benefits & more. Generous with her expertise, Lisa is also an active member of the SHRM Southeastern Chapter of Pennsylvania.

Lenny Irgang

LENNY IRGANG

VP, Director, Digital Media

LENNY IRGANG

VP, Director, Digital Media


Lenny brings over 20 years' experience in digital marketing to MSM. He is responsible for the agency's digital offering, overseeing the development, implementation, and optimization of all digital activity while also providing strategic direction for digital solutions. Most recently, Lenny managed digital marketing on the brand side at Recovery Centers of America and Insomnia Cookies. He also previously worked for an independent media agency in NYC.

Ray Mayo portrait

RAY MAYO

Chief Executive Officer

Ray Mayo

Chief Executive Officer


Under co-founder & CEO Ray's leadership, MayoSeitz Media has grown into one of the top independent media agencies in the country. Ray was a legend long before MSM opened its doors, managing $100MM+ media departments at Earle Palmer Brown/Philadelphia and GKV in Baltimore, among the mid-Atlantic region's largest agencies. Fully engaged on all initiatives, he lives, eats, and breathes strategic success, which filters down to every MSM team member.
Jon Seitz portrait

JON SEITZ

General Manager

Jon Seitz

General Manager


Our founding partner brings a unique perspective and superbly honed skills to MayoSeitz, with experience in both agency management and sales. As General Manager, Jon is head coach of a championship team, fine-tuning the entire operation into a well-oiled machine. Jon is a respected mentor and all-around great guy who volunteers his time and talent for several committees, including the 4As and the Philadelphia Ad Club.
Mary Tyrrell portrait

Mary Tyrrell

President and Chief Operating Officer

Mary Tyrrell

President and Chief Operating Officer


Not just a talented media strategist, Mary is also a master juggler—leading the MayoSeitz multi-disciplinary team. She never sits still and knows how to pivot—driving innovation and evolution in an industry that changes practically by the minute. Mary is intimately engaged in media strategy development and works tirelessly towards client success with effective, economical, and creative media management.
Jessica Rosenthal portrait

JESSICA ROSENTHAL

SVP, Director of Video & Audio

Jessica Rosenthal

SVP, Director of Video & Audio


Jessica leads the Video and Audio Team with creativity, strategy, and deep industry expertise. A New York City media veteran, she's delivered standout work for national brands like Got Milk? and Ace Hardware, and is known for forging strong partnerships and crafting smart, effective media solutions.
Adam Yansick portrait

ADAM YANSICK

SVP, Director of Media & Analytics

Adam Yansick

SVP, Director of Media & Analytics


Adam's been a key player on the MayoSeitz team for many years and has excelled at every task he's tackled. Driven, smart, and tenacious, he's got all the right skills and priceless experience to lead the Insights team, which has grown exponentially under his leadership. He oversees Analytics with the mind of an engineer and brings his razor-sharp instincts to planning, strategy, and squeezing the data for every drop of ROI.
Cathy Mazurek

CATHY MAZUREK

SVP, Director of Finance

Cathy Mazurek

SVP, Director of Finance


Cathy brings 30+ years of combined experience in public accounting and within the IPG agency network. At MSM, she leads all financial operations including billing, vendor payments, and reporting. Her experience includes managing both large and small teams for regional, national, and international clients. Cathy is known for her commitment to training, mentoring, and collaboration among agency teams and clients.
Erin Bernethy portrait

ERIN BERNETHY

VP, Director, Integrated Media Strategy

Erin Bernethy

VP, Director, Integrated Media Strategy


Erin oversees media strategy for a mix of national and regional brands at MayoSeitz Media. For her, it's about seamlessly connecting brands with consumers' media journeys, from traditional to digital. She is invigorated by research and data, and she uses this passion to execute strategic, results-driven media campaigns.
Lisa Volpe portrait

LISA VOLPE

Director, Talent & Operations

Lisa Volpe

Director, Talent & Operations


A team is only as good as its people, and Lisa is obsessed with recruiting the very best. She's our HR guru, leveraging over 10 years' experience in a wide range of industries. Lisa knows how to keep talent flowing in an industry with legendary HR demands. She captains all aspects of HR—recruiting, onboarding, employee relations, performance management, payroll, benefits & more. Generous with her expertise, Lisa is also an active member of the SHRM Southeastern Chapter of Pennsylvania.
Lenny Irgang

LENNY IRGANG

VP, Director, Digital Media

Lenny Irgang

VP, Director, Digital Media


Lenny brings over 20 years' experience in digital marketing to MSM. He is responsible for the agency's digital offering, overseeing the development, implementation, and optimization of all digital activity while also providing strategic direction for digital solutions. Most recently, Lenny managed digital marketing on the brand side at Recovery Centers of America and Insomnia Cookies. He also previously worked for an independent media agency in NYC.
Ray Mayo
RAY MAYO
Chief Executive Officer

Ray Mayo

Chief Executive Officer


Under co-founder & CEO Ray's leadership, MayoSeitz Media has grown into one of the top independent media agencies in the country. Ray was a legend long before MSM opened its doors, managing $100MM+ media departments at Earle Palmer Brown/Philadelphia and GKV in Baltimore, among the mid-Atlantic region's largest agencies. Fully engaged on all initiatives, he lives, eats, and breathes strategic success, which filters down to every MSM team member.

Jon Seitz
JON SEITZ
General Manager

JON SEITZ

General Manager


Our founding partner brings a unique perspective and superbly honed skills to MayoSeitz, with experience in both agency management and sales. As General Manager, Jon is head coach of a championship team, fine-tuning the entire operation into a well-oiled machine. Jon is a respected mentor and all-around great guy who volunteers his time and talent for several committees, including the 4As and the Philadelphia Ad Club.

Mary Tyrrell
MARY TYRELL
President and Chief Operating Officer

MARY TYRRELL

President and Chief Operating Officer


Not just a talented media strategist, Mary is also a master juggler—leading the MayoSeitz multi-disciplinary team. She never sits still and knows how to pivot—driving innovation and evolution in an industry that changes practically by the minute. Mary is intimately engaged in media strategy development and works tirelessly towards client success with effective, economical, and creative media management.

Jessica Rosenthal
JESSICA ROSENTHAL
SVP, Director of Video & Audio

JESSICA ROSENTHAL

SVP, Director of Video & Audio


Jessica leads the Video and Audio Team with creativity, strategy, and deep industry expertise. A New York City media veteran, she's delivered standout work for national brands like Got Milk? and Ace Hardware, and is known for forging strong partnerships and crafting smart, effective media solutions.

Adam Yansick
ADAM YANSICK
SVP, Director of Media & Anayltics

ADAM YANSICK

SVP, Director of Media & Analytics


Adam's been a key player on the MayoSeitz team for many years and has excelled at every task he's tackled. Driven, smart, and tenacious, he's got all the right skills and priceless experience to lead the Insights team, which has grown exponentially under his leadership. He oversees Analytics with the mind of an engineer and brings his razor-sharp instincts to planning, strategy, and squeezing the data for every drop of ROI.

Cathy Mazurek
CATHY MAZUREK
SVP, Director of Finance

CATHY MAZUREK

SVP, Director of Finance


Cathy brings 30+ years of combined experience in public accounting and within the IPG agency network. At MSM, she leads all financial operations including billing, vendor payments, and reporting. Her experience includes managing both large and small teams for regional, national, and international clients. Cathy is known for her commitment to training, mentoring, and collaboration among agency teams and clients.

Erin Bernethy
ERIN BERNETHY
VP, Director, Integrated Media Strategy

ERIN BERNETHY

VP, Director, Integrated Media Strategy


Erin oversees media strategy for a mix of national and regional brands at MayoSeitz Media. For her, it's about seamlessly connecting brands with consumers' media journeys, from traditional to digital. She is invigorated by research and data, and she uses this passion to execute strategic, results-driven media campaigns.

Lisa Volpe
LISA VOLPE
Director, Talent & Operations

LISA VOLPE

Director, Talent & Operations


A team is only as good as its people, and Lisa is obsessed with recruiting the very best. She's our HR guru, leveraging over 10 years' experience in a wide range of industries. Lisa knows how to keep talent flowing in an industry with legendary HR demands. She captains all aspects of HR—recruiting, onboarding, employee relations, performance management, payroll, benefits & more. Generous with her expertise, Lisa is also an active member of the SHRM Southeastern Chapter of Pennsylvania.

Lenny Irgang
LENNY IRGANG
VP, Director, Digital Media

LENNY IRGANG

VP, Director, Digital Media


Lenny brings over 20 years' experience in digital marketing to MSM. He is responsible for the agency's digital offering, overseeing the development, implementation, and optimization of all digital activity while also providing strategic direction for digital solutions. Most recently, Lenny managed digital marketing on the brand side at Recovery Centers of America and Insomnia Cookies. He also previously worked for an independent media agency in NYC.

Our Credentials

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4As Membership

MSM is an active member of the American Association of Advertising Agencies—a national trade association that advocates for marketing & advertising agencies. Our leadership team participates in multiple committees & forums so we can help shape policies & best practices.

Philadelphia Ad Club logo

Philadelphia Ad Club

MSM is a member agency of the Philadelphia Ad Club—a non-profit organization that serves the marketing, communications, and creative community in the Greater Philadelphia region. Our Managing Director, Jon Seitz, sits on the board of directors.

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Google Premier Partners

MSM has been named a 2025 Google Premier Partner, which places us among the top 3% of Google Partners in the U.S. This recognition reflects our deep Google Ads expertise, our ability to drive measurable client growth, and our commitment to digital media innovation.

AGENCY CULTURE

MayoSeitz Media is a great place to work with highly engaged employees and exceptional benefits. We offer unparalleled flexibility with a hybrid office/remote schedule, a range of benefits including unlimited PTO, year-round summer hours, gym membership subsidy, and support for volunteering.

 

We also organize charitable initiatives such as Make Service Matter Day, our annual, agency-wide volunteer event, and sponsoring families in need during the holiday season. Each year we proudly present our Impact Award with a generous bonus to an employee who embodies our agency’s core values.

 

Our vibrant culture features a monthly peer recognition raffle, a long-standing tradition of our Cinco de MayoSeitz celebration, and annual events like a Halloween parade and local team tailgates. At MSM, we blend professional growth with a dynamic, supportive community, making it a truly special place to work.

CORE VALUES

Collaboration
We believe in the strength of the collective and gain energy when we are all working together to achieve the same goals.

 

Innovation
We strive to always anticipate, adapt to, and embrace change for better outcomes, encouraging creative and entrepreneurial thinking.

 

Leadership
Be the one others choose to follow, setting expectations and leading by example. Dare to be different, and challenge others to create something unique.

 

Integrity
We hold ourselves to the highest operational, compliance, and ethical standards, extending professional courtesy and respect in all of our business dealings.

 

Commitment
We are passionate about solving complex problems through our tenacity and drive, focusing exceeding expectations & providing superior service.

AGENCY COMMITTEES

Our agency committees empower employees to get involved, learn, and make an impact.

 

Communication: Manages the agency’s social media accounts and blog content.

 

Learning & Development: Hosts training sessions and brings in experts to explore trends, tools, and industry insights.

 

Collective Wellness: Leads charitable initiatives, wellness programs, and keeps our culture fun.

 

Business Development: Engages team members across disciplines in client outreach and growth efforts.

Learning & Development

MayoSeitz Media offers our entire staff a robust array of professional development and career advancement opportunities. We have partnered with LinkedIn Learning and now subscribe to the 4As Learning Institute, which enables us to offer extensive resources including media-specific courses, certifications, and seminars.

 

  • Train new and rising talent on key topics, from effective communications to AI use cases and beyond.
  • Provide managers with team leadership skills and ongoing support.
  • Participate in pilot programs and shape future program offerings.

Community Involvement

At MayoSeitz Media, giving back to our community is a core part of who we are. Our team donates time and energy to local charities, coordinates in-office food and clothing drives, and adopts a local family each holiday season. We also empower our staff to take dedicated volunteer time, helping causes that matter most to them. From hands-on service to meaningful contributions, we’re committed to making a positive impact in the communities where we live and work.
MayoSeitz Media burst