Matthew Rosenberg
@matthewrosenberg
I grow enterprise accounts with a founder’s perspective: understand the customer’s business, earn the next investment, and build the follow-through th
What I'm looking for
I’m Matthew Rosenberg, an enterprise Account Manager and business builder with 12+ years of experience winning customers, growing accounts, and building the processes that support both. My background includes Twilio, Greenhouse, Bizzabo, and JW Player, with enterprise portfolios up to $8.5M and more than $3M in expansion and net-new revenue closed.
I’ve also co-founded a business, building its B2B revenue to $650K annually in under two years. Today, through Rosey Works, I help founders strengthen positioning, customer retention, and sales operations. I bring a founder’s understanding of the business alongside hands-on experience managing complex customer relationships.
Experience
Work history, roles, and key accomplishments
Account Management and Sales Infrastructure Consultant
Rosey Works
Jan 2026 - Present (9 months)
Advises founders on pricing, positioning, and customer retention, and builds account management and customer success programs. Rebuilds company websites and branding, and sets up automations to streamline sales operations.
Co-Founder & Head of Sales
Party Armor & HarmShield
Aug 2023 - Present (3 years 2 months)
Co-founded Party Armor Kits to provide portable drug testing solutions. Defined brand vision and positioned the product as a leader in harm reduction. Built an e-commerce platform and established scalable production solutions.
Partnerships and Growth Manager
FlowFi
Jul 2025 - Mar 2026 (8 months)
Owned renewals and net revenue retention for a book of 60 enterprise partners, producing $500,000 in retained revenue. Signed 25 new partnerships and closed $500,000 in expansion tied to measurable customer results.
Co-Founder and Head of Business Development
Party Armor Kits
Jan 2023 - Jun 2025 (2 years 5 months)
Co-founded the company and built the B2B side from zero to $650K in annual recurring revenue in under 24 months. Cut customer acquisition cost 35% and increased new-customer count 28% year over year.
Co-Founder & Head of Growth
Test Assured
Jan 2023 - Aug 2023 (7 months)
Launched and executed GTM strategy, generating $500K ARR in the first year. Built marketing and sales teams from scratch, implementing a digital tech stack to optimize operations.
Managed a $6.5 million ARR portfolio of AI-driven anti-fraud clients. Achieved over 100% quota attainment and developed scalable email marketing sequences to increase SQLs.
Managed an $8.5 million ARR book of business, achieving 179% quota attainment in Q2 2022. Developed automated workflows to reduce churn and enhance account expansion.
Owned renewals and revenue growth on an $8.5M enterprise book, adding $950,000 in new revenue and finishing Q2 at 179% of quota. Raised product adoption more than 40% across the book and added $250,000 to an annual contract through strategic recommendations.
Strategic Account Manager
Bizzabo
Jun 2021 - Jan 2022 (7 months)
Managed a $4.2 million book specializing in digital event marketing. Generated $300K in net new revenue while maintaining churn below 10%.
Senior Account Manager
Bizzabo
May 2021 - Dec 2021 (7 months)
Grew a $5M customer base past $5.6M by closing upsell and cross-sell at a 45% win rate. Improved account engagement 33% with tailored account plans and executive check-ins.
Owned renewals and expansion for enterprise accounts, adding $1.1M in new annual recurring revenue. Finished Q4 2020 at 123% of quota and Q1 2021 at 115%, and earned President's Club in 2020.
Owned a $4.5 million portfolio, achieving 115% quota in Q1 2021. Recognized as Presidents Club winner for exceeding quota and driving significant new ARR growth.
Managed a $3.8 million ARR book, increasing net revenue by 25% YoY. Closed $660K in new business, surpassing sales goals.
Account Manager
Fundera
Nov 2015 - Jan 2017 (1 year 2 months)
Produced $500K in monthly funding revenue across more than 300 small and mid-sized business clients, and lowered their average cost of financing 15%.
Expansion Executive
WeWork
Jul 2015 - Oct 2015 (3 months)
Closed deals for 70% of co-working space at the launch of 110 Wall Street. Recruited and hired new SDRs to expand the sales team.
Account Executive and Sales Development Manager
WeWork
Feb 2014 - Oct 2015 (1 year 8 months)
Closed more than 800 deals at 118% of goal. Built and led a sales development team, and cut the sales cycle 22% by rebuilding CRM workflows and follow-up cadences.
New Member Development Associate & Manager
WeWork
Aug 2014 - Jun 2015 (10 months)
Led sales and community growth efforts, managing new membership acquisitions and contributing to significant desk sales.
Head of Sales
Parliament Tutors
May 2010 - Oct 2012 (2 years 5 months)
Grew the company to $1.2M in revenue and expanded the customer base 1,400% year over year, running sales across a national network of more than 400 tutors.
Education
Degrees, certifications, and relevant coursework
University
Bachelor of Arts, Economics
2007 - 2010
Individualized Study with a focus on Economics. Developed skills in designing logos, branding, and product development using Canva and website development using Hostinger/Wordpress. Managed outreach and closed retail, wholesale, and convenience store deals across various verticals.
New York University
Bachelor of Arts, Individualized Study
2006 - 2010
Bachelor of Arts in Individualized Study from New York University, completed in 2010.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Social media
Job categories
Skills
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