David Zeff ✌️

Head Of Sales

Whistle

Our global team of over 100 Whistlers has supported over 300 B2B companies, many of whom have gone on to raise a total of over $2Bn or have been acquired. In a given month we deliver over $15M in qualified pipeline for our clients using a combination of cutting-edge technology, evidence-based systems, and world-class talent. 

Whistle is built on the principles of integrity, transparency, and deploying best practices at all times. 
We work with fast-growing tech companies needing an outsourced SDR provider as well as enterprise companies looking to offshore vetted and skilled Marketing and Sales talent, with native English, German, French, Spanish, Portuguese, and Mandarin speakers that are ready to grow your company.

You can learn more about how we help businesses grow at www.whistle.ltd.

Chief Executive Officer

Sinorbis

Strategic Advisor tasked with building a world class enterprise sales team and sales development process to ensure that key business objectives are met. Working directly alongside the CEO, VP Marketing and VP Business Development to create a scalable sales process, and facilitate the training and onboarding of account executives and business development representatives.

Strategic Advisor, Board Member

Exceed.ai - Exited to Genesis

In my role as Head of Sales at Exceed, I built the entire end to end sales process and was responsible for all sales, processes, operations, creating the company’s first marketing, sales, product and support alignment and building strategic partnerships.  

My role also saw me working closely with investors, as we raised a $4M Series A & subsequently were acquired by Genesys.

Graduway - Exited to K1 Investment Management

Responsible for the creation and management of Graduway's North American business unit. My role included leading a team of account executives and sales development representatives to exceed company sales targets in key verticals. 

In my role, I was also responsible for creating the K-12 category, which became the highest performing category in the company and for creating and managing teams for both the K-12 and Enterprise divisions. I was also tasked with creating partnerships with key stakeholders & regularly lead thought leadership sessions around the world.

Experience in enterprise sales, creating targeted marketing campaigns, public speaking, brand ambassadorship, partnerships, conference exhibitions and strategic campaigns.

With thanks in part to the performance of my team, Graduway successfully raised $12.7M in Series B Funding from Susquehanna General Equity Partners and was purchased by Private Equity firm K1 Investment Capital in 2017.

Vice President of Sales, USA

Graduway

As employee #8 (3rd sales hire), I was involved in many aspects of growing the company from its modest beginnings above a coffee shop to becoming a leader in Alumni Engagement technology, empowering over 1,000 of the worlds best Higher Education and Non Profits.

I served as an account executive across North America and the UK and my personal contribution represented approximately 25% of total company sales. Responsibilities included B2B enterprise SAAS sales, contracts, RFPS, competitor analysis, strategic campaign development, client management and liaison, event management, exhibitions, public speaking and conferences.

Senior Account Executive

Vice President of a team of 15 Sales Development Representatives for B2B sales across global markets. 
Responsibilities included hiring, training, and development of Sales Development Representatives, team management, creation and accomplishment of targets in line with company objectives, campaign creation, and inbound marketing strategy, overseeing registration for multiple events with hundreds of attendees across the world.

VP Sales Development

OneFitStop - Exited to Private Investors

OneFitStop is a revolutionary SAAS platform for fitness professionals, enabling total client and business management. OneFitStop was awarded an Australian Government Research and Development Grant in 2013 and has raised $17M to date.

Responsibilities included founding the business, concept development, technology design and creation, product testing, marketing strategy and implementation, sales development, investor relations, industry partnership development, supplier management, sponsorship and exhibitions.

OneFitStop was sold in October 2015 to a consortium of private investors.

Co-Founder, CEO 

Fitness First Australia

Responsibilities included development of a new Fitness First training centre, providing high quality health and fitness services to hundreds of members and assisting in the management of the personal training team and member relations.

I also worked alongside Rebel Sport and Lorna Jane to promote fitness services to hundreds of customers.

Franchise Owner

Mergermarket

Responsibilities included analysing and predicting market trends, specialist reporting on forthcoming mergers and acquisitions in the Australian marketplace in the services, defence and manufacturing industries.

Financial Reporter

With over 10 years of selling technology to hundreds of SMB and Enterprise companies across multiple sectors, I have begun to wrap my head around the art of sales. 

I've been a part of 3 exits - one as a founder and two as a founding sales lead. I'm a people person, who loves to connect, lead, share experiences, coach, strategize and implement. I enjoy writing and sharing ideas and look to work with sales leaders and founders who are creating the impossible.

I have built and scaled full cycle business units and as an individual contributor, I have signed large enterprise deals with over 500 companies. 

I take that knowledge into Whistle, a revenue generation company supports over 150 customers through best practice sales and marketing. We offer the best people, processes and full transparency and are proud to work with leading B2B brands worldwide. To learn more, head to www.whistle.ltd

Businesses, much like rockets, either reach the moon or blow up. 
We're here to prevent the latter.

Whistle is built on the principles of integrity, transparency and deploying best practices at all times. Our goal is to help each of our clients to their next 100 B2B customers and we do so by attracting conversation ready prospects to our customers using a combination of cutting edge technology, evidence based systems and world class talent. You can learn more about how we help promising businesses grow at www.callwhistle.com.

Contguard

Fractional CMO

TruLux AI

TruLux provides an AI-driven solution for authenticating and tracing luxury items, ensuring their authenticity and offering safe transactions for all customers. Utilizing advanced sensing technology, our platform tracks items throughout their lifecycle, preserving brand integrity and enhancing customer engagement with comprehensive provenance data.

LaundroSmart

Fractional  CMO

Madrigal Mental Care

Marketing Advisor for Madrigal Mental Health and member of the Advisory Board of the company

Tanka

Chief Marketing Officer

ya. marketing 

Founder & CEO

Penguin Strategies

Senior Marketing Strategist

Labstyle Innovations - Dario

•	Lead the Company’s worldwide marketing strategy and activities inbound and outbound
•	Develop and execute comprehensive marketing plans and programs to support sales and revenue  objectives
•	Monitor and oversee the marketing plans to ensure consistency with sales and organizations  objectives
•	Position company as market leader and create awareness to brand and services
•	Generate the demand to meet sales and revenue goals
•	Support all stages of the sales cycle
•       Responsible for planning and budgetary control of all marketing activities (direct and online)
•	Evaluating customer research, market conditions and competitor data
•	Review new technologies and keep the company at the forefront of developments in digital marketing

Strategic Marketing Director

Viora

•	Develop and implement marketing strategies with focus on high growth in revenue and ROI in marketing costs
•	Oversee marketing communications including branding, public relations, advertising, white papers, trade shows, seminars and events collateral materials, analyst and market research management, and website design and content either directly or on an outsourced basis
•	Work closely with Senior Sales Management in creating territorial marketing strategies – direct and via distribution networks
•	Reporting, analysis and on-going optimization of all marketing channels
•	Research, identify and implement new online traffic and customer acquisition opportunities
•	Ongoing planning and implementation of customer acquisition activities
•	Manage outside agencies
•	Developing and managing digital and print marketing campaigns
•	Managing online brand and product campaigns to raise brand awareness, leads
•	Managing the redesign of the company website
•	Improving the usability, design, content and conversion of the company website
•	Responsible for planning and budgetary control of all marketing activities (direct and online)
•	Evaluating customer research, market conditions and competitor data
•	Review new technologies and keep the company at the forefront of developments in digital marketing
•	CRM implementation company-wide

Global Marketing Director

Press-sense

•	Responsible for all Marketing/MarCom activities (working with designers, setting up trade shows, market research, etc.)
•	Analyze performance and recommend/implement improvements to meet marketing objectives
•       Research and planning of the right positioning and messaging channels
•       Managed strategic planning and marketing budget
•	Creation of visual and textual marketing collateral
•	Responsible for website creation and management
•	Project, process, and vendor management 
•	Improve the effectiveness of core marketing processes (new product development, brand management, product naming and positioning, marketing communications, and pricing)
•	Measuring the return on investment (ROI) of and marketing effectiveness various marketing initiative
•	Maintaining a marketing orientation for the business (customer focus, corporate identity standards)

International Marketing Director

Full-stack marketing strategist | B2B Tech & MedTech Growth Strategist | Fluent in English, French, Hebrew & Sarcasm | Life motto: Challenge accepted!

With over 25 years of experience as a Marketer, Fractional CMO and Advisor, I have had the priviledge to work with dozens of startups and multi-million-dollar enterprises across international markets to drive growth, transform strategies, and deliver measurable results. My experience includes go-to-market strategies, market-driven growth, and investment consulting, combined with a solid understanding of complex technologies to help businesses meet real-world market demands.

I bring a balanced approach to leadership, working comfortably in the boardroom to set strategic direction while actively collaborating with marketing, product, and sales teams to execute plans. This dual perspective enables me to address both high-level business goals and the practical steps required to achieve them, both for scaling a startup or refining operations for larger organizations.

Beyond marketing leadership, I work closely with early-stage start-ups as an investment consultant, aligning visions with investor expectations to secure the resources and partnerships needed for long-term success. My ability to bridge the gap between market opportunities and business objectives creates a common language between founders and investors, accelerating the funding process.

Collaborating across borders and industries, I’ve helped organizations tackle the toughest challenges, from entering new markets to creating customer-focused campaigns that deliver exceptional ROI.

In short, I help businesses grow, investors invest, and technologies make sense.

taplio

The Battle

David Zeff ✌️

Yael Ayalon

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