You don’t hire an agency.You hire the people.

Stefan Willimann brings a deep background in media, marketing, and data transformation to his role as CEO of TribalVision. A seasoned executive with decades of experience, Stefan is known for building high-performing teams, scaling organizations, and helping businesses harness the power of data to drive smarter marketing.

Before joining TribalVision, Stefan served as CEO of SIGMA Marketing Group, where he led the firm’s evolution into a data-driven marketing powerhouse serving Fortune 1000 clients. Following SIGMA’s acquisition by iSOCRATES in 2023, Stefan continued on as a Partner and Practice Lead—guiding integration efforts and ensuring long-term client success.

His earlier career includes leadership roles at CBS Broadcasting, where he helped bridge traditional and digital media as SVP of CBS Outernet Media and VP of Strategic Sales & Marketing. He’s also held roles at WorldNow in NYC and previously founded BroadcastMarketing/BMS, a multimedia agency he built from the ground up and successfully exited in 2004.

Throughout his career, Stefan has been recognized for his forward-thinking approach and passion for innovation. He holds a degree in Sports Marketing & Management from Tulane University and lives in Rhode Island with his wife and college-bound son.

A lifelong Jets fan, he’s still waiting for that elusive Super Bowl run—and not giving up hope.

With over 25 years of experience in auditing, accounting, and finance, Nancy Dykstra ensures that TribalVision runs smoothly behind the scenes. As VP of Finance & Administration, she manages all things numbers and people—from financial reporting and budgeting to payroll, benefits, and compliance.

Nancy began her career at PwC and has supported both public and private companies across a range of industries. She’s especially proud of leading TribalVision’s ERP implementation and helping make recent ownership transitions seamless for clients and staff alike.

Her work philosophy is simple: Do what needs to be done. No job is too small or outside her scope if it helps the team succeed.

Outside of work, Nancy is a proud mom of two grown sons, a Broadway musical lover, and a lifelong Red Sox fan. She once passed all parts of the CPA exam in a single sitting—back when it was handwritten over two and a half days. Her dad, also a CPA, couldn’t have been prouder.

As VP of Media Services at TribalVision, Randi Lucius leads the team behind the tactics—paid search, SEO, social, email, and everything in between. She ensures campaigns are not only expertly executed but also aligned with strategic goals and set up for measurable success.

Randi has nearly two decades of agency experience, starting in paid search before expanding into a full-funnel media role. She’s known for her sharp thinking, team-first mentality, and relentless commitment to driving performance.

She’s especially proud of the evolution of BlueKnight’s Google Ads and LSA campaigns, which saw dramatic improvements after months of optimization by her team.

At home, Randi and her husband Josh live with their two cats and dog Huey. She’s a movie buff, a TikTok scroller, and a Reddit regular with a soft spot for smart humor and niche podcasts—favorites include How Did This Get Made?, RedHanded, and The Weekly Planet.

As VP of Growth at TribalVision, Gregg Sullivan brings a passion for building meaningful connections and driving client success through collaboration and creative problem-solving. With a strong background in leadership and business development, he thrives in fast-paced environments where teamwork and innovation deliver measurable results. Known for his positivity, reliability, and solutions-oriented mindset, Gregg approaches every engagement with a focus on growth and shared success.

Before joining TribalVision, Gregg built his career in business development and client strategy, including his time working alongside Stefan at SIGMA Data Insights. His work has consistently centered on helping organizations grow through strong relationships and effective strategic execution.

Originally from the Boston area, Gregg spent many summers on Lake Winnipesaukee before settling in Florida, where he lives with his wife. A proud father of four and a new grandfather, family is at the heart of everything he does. Outside of work, he enjoys time on the water, an occasional pickleball game, exploring the outdoors, and making lasting memories with loved ones.

Diana DiLoreto is the steady hand at the helm of complex client relationships. As Group Account Director, she leads onboarding, strategy, and communication across key accounts, stepping in whenever challenges arise—and guiding clients through them with clarity and calm.

With a background in writing, publishing, and marketing, Diana’s been with TribalVision since day one of her career—rising through the ranks and shaping the agency’s client approach along the way. She’s helped scale media budgets, refine messaging, and ensure performance stays sharp.

Diana is driven by curiosity and a love of problem-solving. She sees every client ask as a puzzle worth solving and values asking the right questions as much as finding the right answer.Originally from Upstate New York, Diana now lives in Toronto and flies down to Boston whenever she’s craving seafood. She’s a fan of Howl’s Moving Castle, and once came close to a law career after excelling in statewide mock trial competitions.

Whitney Bonham is all about partnership. As a Group Account Director, she leads client relationships with a clear focus on trust, collaboration, and measurable results. She’s a connector at heart—translating strategy into action across internal teams while keeping the client experience front and center.

With experience in both agency and nonprofit spaces, Whitney’s background includes roles in copywriting, marketing, event planning, and development. Her work has spanned everything from school fundraising to international nonprofit campaigns. That versatility shows up in the way she approaches every challenge: open-minded, people-first, and laser-focused on outcomes.

Whitney is especially proud of the long-term relationships she’s built—many clients stay with TribalVision year after year, and often come back again. That loyalty is a testament to the work and the team behind it.

Off the clock, Whitney enjoys traveling (with just one continent left to conquer), volunteering with youth organizations, and catching a musical at PPAC. She lives in Rhode Island with her dog Ollie, a foster-turned-permanent roommate from the early pandemic days.

With over 30 years in marketing project management, Stephanie Ruelke leads with process, precision, and a knack for mentoring strong teams. As Program Director at TribalVision, she ensures client projects run smoothly and deliver impact—on time, on brand, and on budget.

Stephanie’s background spans traditional and digital media, including broadcast, print, and web. Before joining TribalVision, she worked with award-winning agencies across sectors like hospitality, healthcare, real estate, and nonprofit—leading everything from ERP rollouts to company-wide training programs.

A highlight of her TribalVision tenure? Helping architect the agency’s project management systems—a behind-the-scenes initiative that has helped power more efficient, effective work across the board.Stephanie lives on the St. Johns River with her husband and their Great Dane. She’s a collector of vintage uranium glass, a fan of minimalism (“Don’t add, just subtract”), and someone who believes that every detail matters—because every touchpoint is a chance to make a difference.

Christina Simonetti brings structure and strategy to every initiative. As a Program Director at TribalVision, she oversees scoping, resourcing, and planning across departments—helping turn big ideas into well-executed campaigns.

With 11 years of experience in digital marketing across both publisher and agency settings, Christina has a strong foundation in ad operations and workflow optimization. She plays a key role in shaping agency-wide processes, streamlining client onboarding, and driving smarter lead generation.

One standout initiative she’s led? The rollout of WMJ, which has generated data-driven insights and tangible process improvements across the agency.Outside of work, Christina and her husband are busy (and dusty) renovating their old New England home. She’s always in the kitchen, rain or shine, and tunes into No Such Thing as a Fish to keep her trivia game sharp.

As Head of Business Intelligence and Data Analytics at TribalVision, Travis Sandoe leads efforts to turn complex data into clear, actionable insights. He helps both TribalVision and its clients make smarter, data-driven decisions through intuitive dashboards and scalable data strategies.

With over a decade of experience, Travis has led analytics initiatives across tech startups, government agencies, Big 4 consulting, and Fortune 500 companies. He’s especially skilled in workflow automation, forecasting models, and enterprise dashboard design, including his time at PwC as a Data Visualization Lead.

He’s particularly proud of developing automated Tableau Prep workflows for a government contractor that eliminated over 300 hours of manual work each week.

Outside of work, Travis lives in sunny Land O’ Lakes, Florida with his wife and growing family. He’s a DIY enthusiast, skate rat, proud dad, and concertgoer

Caitlin Cory leads TribalVision’s social media team with a focus on smart strategy, seamless execution, and client results. As Associate Director of Social Media, she manages both paid and organic accounts across industries—ensuring quality work that meets goals and exceeds expectations.

Before joining TribalVision, Caitlin spent time in project management at Hasbro Toys, overseeing beloved brands like NERF, PreSkool, and Play-Doh. Combined with her agency experience, this background gives her a unique perspective on how to tell stories that connect.

She’s especially proud of implementing Sprout Social agency-wide—transforming manual processes into streamlined, data-driven systems that improved everything from content calendars to reporting.Outside of work, Caitlin loves beach days, lakeside vacations at Winnipesaukee, shopping sprees, and wine nights with family and friends. A recent newlywed, she lives in Newport with her husband and has a soft spot for romance novels and pop culture podcasts like Chicks in the Office and Giggly Squad.

As Senior Paid Search Manager at TribalVision, Ashley Hannaway leads the paid search team, overseeing campaign performance and driving strategy across all accounts. Her focus is on delivering measurable results while acting as a strategic partner to every client.

Ashley brings agency and in-house experience across industries like e-commerce, B2B, and education. She’s been recognized in the search industry for award-winning client work, including a US Search Award for Best Local PPC Campaign and a nomination for Best Low Budget Campaign.

She especially enjoys building new campaign strategies and watching the data prove their impact. Her approach is rooted in collaboration and open communication, ensuring all voices are heard and the best ideas rise to the top.

Outside of work, Ashley lives in Massachusetts with her husband, daughter, and three cats. She’s a marathoner, a Big Brother superfan, and a devoted nail polish collector who’s always up for trying a new brewery.