
William Sullivan
Verified Expert in Marketing
Marketing Expert
San Diego, CA, United States
Toptal member since April 30, 2026
William is an elite C-level executive who bridges agile startup innovation with Fortune 500 rigor. After scaling and selling digital ventures to Warner Brothers and ServiceMagic (later acquired by IAC), he led massive revenue-optimization and operational turnarounds for Intuit, Scotts, and DCH Auto Group. Specializing in go-to-market strategies and M&A execution, William partners with businesses to deliver definitive market exits, rapid growth, and margin expansion.
Project Highlights
Expertise
- Ads Management
- Chief Marketing Officer (CMO)
- Data Analysis
- Fractional CMO
- P&L Management
- Performance Analysis
- SEO Consultant
- Social Media Strategy
Work Experience
CEO | Vice President | Senior Digital Marketing Strategist
Repedio
- Worked with notable clients across multiple industries, including Western Digital, LVMH, Trident Mortgage, CashCall, Sephora, SunRun, SunCity, and Tesla.
- Fulfilled CMO core skill duties: data and analytics mastery, AI and automation adoption, financial acumen and budgeting, strategic thinking/GM mindset, cross-functional collaboration, and immersion and stakeholder interviews.
- Leveraged CMO key skills: immersion and stakeholder interviews, customer and market analysis, audit of marketing assets and tech stack, implementation of quick wins, and drafting the 90-day strategy.
- Performed CMO duties, including paid media, native media, terrestrial media, creative direction, staff formulation, GTM execution plans, client retention, staff mix, and media mix strategy.
- Participated in the 30-day focus: Immersion and Observation (week 1), Audit and Data Deep Dive (week 2), Identifying Quick Wins (week 3), and Strategic Planning and Reporting (week 4).
- Built an action-oriented team leveraging hypothesis-driven A/B testing to identify and scale winning strategies, delivering a client ROAS increase from 1.66 to 11.87.
- Led go-to-market planning and execution for a direct-to-consumer (DTC) startup across major platforms, including SEO, Google Shopping, Google Ads, Amazon, and eBay, growing revenue 46% year-over-year.
Senior Manager, Media Strategy and Affiliate
Scotts Miracle-Gro
- Achieved +16x paid media MMX ROAS and a 5x increase in social MMX ROAS.
- Owned the P&L for digital marketing. Owned B2C and B2B markets across DTC, OTT, DSP, and affiliate marketing, with an ad budget of up to $27 million annually.
- Led internal and external teams, plus multiple agency partners. Built all media strategies for the digital and linear media mix, consisting of SEO, paid search, paid social, OTT, DSP, content, audio, and affiliate.
- Worked on several C-suite ad hoc projects that were instrumental in the decision of adding or removing new products to the SMG portfolio.
Director of Internet Sales and Marketing
Sunfood Inc.
- Served B2C and B2B markets. Generated a 37% sales increase in digital channels, resulting in net revenue increases of 17% in both English and Spanish markets.
- Contributed to a cart abandonment initiative that drove a +1,200 index increase in recaptured revenue. Solved negative performing PPC portfolio of -253 index to +800, including Google shopping turnaround from -1000 to +165 index.
- Implemented a marketplace strategy that doubled revenue and unit sales over a 12-month period. Affiliate added 1 million new views with 5,000 new sign-ups to the primary website.
- Owned P&L and the marketing budget with an index of +125 YoY.
Search Marketing Manager (SEO/SEM/Paid Media)
Intuit
- Handled ad budgets of up to $50+ million, increasing profitability across PPC/SEO/CRM/social. Owned P&L for SEO and paid media. ROI increased +121 YoY.
- Revived a legacy enterprise brand's (Quicken) paid media portfolio, SEO/PPC/paid social, display, and programmatic, achieving 2x ROAS in 45 days with strategic implementation.
- Aligned agency mix from 12 to 7 with a core focus on ROAS that resulted in cost savings in excess of $1.6 million, increasing ROAS to a 1.39 index within two quarters.
- Handled big data analytics sets with over 2 million data points that were analyzed and acted upon on a weekly basis.
Project History
Strategic Pivot and Acquisition Exit
https://businesspathsolutions.com/project/mobile-bean-counter/- 127% — Net Revenue Retention
- 117% — Sales Growth Rate
The client operated as a solo developer, treating the product as a project rather than a structured business, with no formal business formation. There was limited product awareness and no clear vision for organizational growth or scalability. The existing MVP was siloed within Android architecture, creating a technical ceiling that constrained the platform’s potential from the outset.
I revised the organization to include a CEO, COO, CTO, developer, and general coordinator. I adjusted marketing target cohorts based on data analysis and retargeted to iOS and Android. An additional developer added capacity and throughput for front- and back-end development. I also crafted and implemented a go-to-market plan.
I instituted a written plan mapping KPI goals. New user cohorts drove down customer acquisition costs while increasing lifetime value. A go-to-market plan accelerated revenue growth, positioning the business for a successful exit.
Rent-a-Chap: Digital Scale and Acquisition
https://businesspathsolutions.com/project/rent-a-chap/- 48% — Lead Conversion Rate
Rent-a-Chap was a hyper-local, founder-dependent home services marketplace struggling to scale beyond manual classified ads and word-of-mouth sales. The business wanted to move into a digital-first database-connected model. The task was to transform the manual, paper-based business model into a scalable, digitally optimized asset primed for acquisition by a national platform.
I transitioned the company from print to targeted digital advertising and built a robust user acquisition strategy. I implemented an automated contractor vetting and review system to maintain quality control during rapid growth. I formalized key growth metrics, including geographic density and conversion rates, to position the company for enterprise buyers.
I rapidly and economically scaled the platform from zero to nearly 20,000 digital users. I maximized founder value by navigating due diligence and securing a lucrative acquisition within the ServiceMagic ecosystem.
Cybersecurity Modernization and MFA Gateway Implementation
https://businesspathsolutions.com/project/insurability-cliff/- 2.81 — Phishing Simulation Click-through Rate
- CP 5 Days 97.8% — Patch Latency and Compliance Rate
Apex Logistics, a mid-sized freight coordinator, faced catastrophic operational and contractual risks following the denial of its cyber liability insurance renewal. The incumbent carrier cited a lack of modern security controls (MFA) on a legacy ERP system, exposure of RDP ports, and the absence of an incident response plan (IRP).
As a lead risk architect, I bridged IT and business risk to overhaul our security posture in under 30 days, securing critical coverage. I conducted a mock forensic underwriting audit to identify and resolve vulnerabilities. I engineered a secure MFA gateway for a 15-year legacy ERP and satisfied strict underwriter demands, saving $500,000 and avoiding a six-month overhaul. I authored an IRP and led the executives through a three-hour ransomware tabletop exercise to guarantee readiness.
I achieved 12% reduction in insurance premiums by demonstrating a proactive, mature risk management profile. I saved the client $500,000 by circumventing the need to replace their legacy ERP system, which still meets modern compliance requirements.
Education
Certification in Six Sigma
Villanova University - Philadelphia, PA, USA
Bachelor of Science Degree in Finance
University of North Alabama (UNA) - Florence, AL, USA
Certifications
Google Analytics Certification
Google Analytics Academy
Google Ads Certification
Skills
Core
Pay-per-Click (PPC), Google Paid Ads, Google Ads, Conversion Rate Optimization (CRO), Funnel Analysis, Funnel Optimization, Search Engine Optimization (SEO), Marketing, Agile Marketing, Ads, YouTube Ads, X (formerly Twitter) Ads, Craigslist Ads Posting, Local SEO, On-page SEO, Google SEO, SEO Audits, SEO Marketing, Organic SEO, Off-page SEO, Organic Social Media, Social Media Management, Social Media Strategy, Social Media Marketing (SMM), Social Media Advertising, Social Media Optimization, Go-to-market (GTM) Strategies, Chief Marketing Officer (CMO), Marketing Analytics, Paid Advertising, Marketing Leadership, Copywriting, Email Marketing, Email Marketing Automation, Digital Marketing Strategy, Marketing Strategy, Mobile Marketing, Digital Marketing, A/B Testing, Performance Marketing, Ad Campaigns, Affiliate Marketing, Lead Generation, Growth Hacking, Media Buying, Marketing Automation, B2C Marketing, Keyword Research, Influencer Marketing, Landing Pages, Content Strategy, Customer Experience (CX) Design, Omnichannel Marketing, Return on Ad Spend (ROAS), Marketing Operations, Market Research & Analysis, Branding, Funnel Marketing, Inbound Marketing, Content Creation, Brand Marketing, Search Engine Marketing (SEM), Product Marketing, Audience Targeting, Social Media Analytics, Social Media, Google Tag Manager, Ad Design, Video Ads, TikTok Ads, LinkedIn Ads, Facebook Ads, Apple Search Ads, Facebook Video Ads, SEO Tools, SEO Backlinking, WordPress SEO, Social Media Design, Social Media Posting, App Store Optimization (ASO), LinkedIn Marketing, AI Marketing, AdMob, Reddit Ads, SEO Content, Marketing Technology (MarTech), TV Advertising, Mobile Advertising, Google Advertising, Display Advertising, Digital Advertising, Creative Advertising, Advertising Campaigns, Interactive Advertising, Print Advertising, Digital Out-of-home (DOOH) Advertising, Sales Analysis, Google AdMob
Platforms & Tools
HubSpot, Instagram Ads, Facebook Ads Manager, Google Ad Manager, Amazon Advertising, Amazon FBA, Mailchimp, CRM Systems, Google Analytics 4 (GA4), TikTok, Taboola, Adobe Experience Manager (AEM), Salesforce Marketing Cloud, Looker Studio, YouTube Shorts, Google Display & Video 360 (DV360), Monday.com, Search Ads 360, Google Ads Editor, Yoast SEO, Amazon SEO, Magento SEO, Klaviyo, Bing Ads, Digital Advertising Platforms, Advertising Tools & Platforms, Google Analytics, Amazon Reviews, Amazon Marketing Services (AMS)
Business Models
Business to Business (B2B), Software as a Service (SaaS), SaaS, B2B, SaaS Product Marketing, Business to Consumer (B2C), B2C
Technical
Direct Response Marketing, Web3, CSS, HTML, JavaScript
Other
PPC Campaign Management, Paid Media, Campaigns, Google Shopping Ads, Google Display Network, Data Analysis, Website Traffic, Performance Analysis, Performance Metrics, Marketing Metrics, Key Performance Metrics, Metrics, Cohort Analysis, Goal Management, Attribution Modeling, Reporting, Campaign Performance, Organic Search Traffic, eCommerce Analysis, Unified Threat Management (UTM), Key Performance Indicators (KPIs), Data Cleaning, Statistical Analysis, Finanace, Management, Lean Six Sigma, Agile Data Science, Meta Ads, Advisory, Native Ads, Ads Management, Google Video Ads, Google Display Ads, Google Local Services Ads, SEO with AI, YouTube SEO, SEO Analysis, eCommerce SEO, SEO Consultant, SEO Testing, Programmatic SEO, SEO Reporting, Technical SEO, Enterprise SEO, P&L Management, Marketing Management, Media Management, Time Management, Cost Management, Asset Management, Social Ad Design, Social Commerce, Social, Social Media Engagement, Social Media Web Traffic, Finance, Finance Management, Revenue Operations (RevOps), Reorganization, Organizational Change Management (OCM), Change Management, Chief Operating Office, CEO, Strategic Leadership, Executive Coaching, Privacy Policy, Debugging, Fractional CMO, Vendor Management, Growth Marketing, Email Marketing Strategy, Fitness, Health & Wellness, Startups, App Store, Growth Strategy, Geofencing & Geotargeting, Data Analytics (Marketing), Landing Page Optimization, Multi-channel, Amazon, Amazon Seller Central, Paid Search, B2B Lead Generation, Creative Strategy, Creative Testing, B2B Marketing, Content Calendar Management, Newsletters, Market Opportunity Analysis, Marketing Plans, Marketplaces, Startup Marketing, Customer Acquisition, Direct to Consumer (D2C), Paid social, eCommerce, Product Launch, Nutrition & Supplements, eCommerce Marketing, eCommerce Growth, Catalog management, Marketing Channel Strategy, Partnership Marketing, Keyword Mapping, Generative Engine Optimization (GEO), HubSpot CRM, Loyalty Programs/CRM, Analytics Platforms, Campaign Optimization, Community Marketing, Instagram, Referral Programs, YouTube, Facebook, Go-to-market (GTM) Planning, Banking & Finance, Customer Relationship Management (CRM), Email Outreach, CX Strategy, Loyalty Programs, Organizational Structure, Execution, Customer Lifetime Value (CLV), Lifecycle Marketing, CRM, Campaign Execution, Partnerships, Product Strategy, Website Copywriting, Demand Generation, Squarespace, Web Design, Website Management, Inventory Management, Coaching, Retail & Wholesale, Go-to-market Execution, Brand Positioning, Community Growth, Community, Customer Acquisition Cost (CAC), Lifetime Value (LTV), Financial Services, Business Consulting, Business Strategy, Venture Capital, Fundraising, User Onboarding, User Retention, Early-stage Startups, Gaming Platforms, Outbrain, Conversions API, Demand-side Platforms (DSPs), Documentation, Server-side Tagging, Facebook Pixel, Google Ads Account Structure, Google Ads Manager Accounts, Governance, Meta Business Manager, Meta Pixel Governance, Partner Access Management, Standard Operating Procedures Development, User Management, Agency Relationship Management (ARM), DNS, SOP Development, Yext, Direct Response, YouTube Marketing, Reels, Google Maps, Ad Optimization, Mobile Apps, Big Data, Azure Data Lake, Reporting & Dashboards, Dashboard Development, AI Agents, Website Design, Databases, Salesforce Reporting & Dashboards, Tableau, g4a, Google Tag Manager API, Event Tracking, Data Retention, Data Import, Data Visualization, API Integration, Google BigQuery, Accounting, Salesforce, Jira, Slack, AI Adoption, CTV Ads, Banner Ads, Spotify Ads, Magazine Ads, Pinterest Ads, Google AdSense, SEO Writing, Shopify SEO, Global SEO, Bid Management, Task Management, Over-the-top Content (OTT), Programmatic Advertising, Social Selling, Sprout Social, Technology, Mobile First, Mobile User Acquisition, Brand Building, App Installation, WordPress, Semrush, Zapier, Private Equity, Nonprofits, Excel Dashboards, AdRoll, Yahoo Ads, Google Ads API, Facebook Ads API, Amazon Sponsored Ads, Product-market Fit, Mergers & Acquisitions (M&A), Exit Strategy, Revenue Growth, Revenue Modeling, Financial Modeling, Business Restructuring, Process Automation, Product Growth, Cybersecurity, Risk Management, Information Technology, Incident Management, Multi-factor Authentication (MFA), Identity & Access Management (IAM), Legacy System Modernization, Network Security, Shopify, Graphic Design, Advertising, Advertising Copy, Advertorials, Advertising Design, Advanced Excel, Advertising Technology (Adtech), Radio Advertising, Business Advisory, In-game Advertising, Keyword Advertising, Outdoor Advertising, Snapchat Advertising, Advertisement Design, Microsoft Advertising, Classified Advertising, Digital Advertising Sales, Advanced Measurement Approach (AMA), Search Engine Advertising (SEA), Brand / Traditional Advertising, Facebook Promotion & Advertisement, Analysis, Analytics, UX Analysis, Ad-hoc Analysis, Adobe Analytics, M&A Analysis, Web Analytics, SWOT Analysis, Cost Analysis, Churn Analysis, Amazon Analytics, Audience Analysis, Data Analytics, Growth Analysis, Video Analytics, Raw Data Analysis, Keyword Analysis, Traffic Analysis, Content Analysis, Systems Analysis, Decision Analysis, Business Analytics, Product Analytics, Google Analytics API, Google, Google Meet, Apple Music, Spotify, Podcasting, Podcast Marketing, Podcast Management, Bing Webmaster, Google Webmaster Tools, Affiliate Programs, Affiliate Management, Amazon Affiliate Program, Affiliate Data Feeds, Amazon FBM, Amazon DSP, Amazon Listings, Amazon Marketplace, Paid Acquisition, Interim CMO, Cookies, Chatbots
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