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Rosie O'Callaghan
Business Manager - Data Science & Machine Learning at Harnham
Professional Background
Rosie O'Callaghan is a dedicated and skilled Business Manager in the dynamic fields of Data Science, Artificial Intelligence (AI), and Machine Learning (ML) at Harnham, the industry leader in Data & Analytics recruitment. With a career at Harnham that dates back several years, Rosie has climbed the ranks from a Recruitment Consultant to her current managerial position, showcasing her adaptability and expertise in the competitive data landscape. She leads a team of five consultants, each specializing in aspects of Data Science, Machine Learning Engineering, and MLOps, guiding them to support clients in attracting top-tier talent in these rapidly evolving fields.
Founded in 2006, Harnham started as a dedicated recruitment business for the Data & Analytics sector. Over the past 15 years, it has grown into a powerhouse with over 130 expert consultants serving clients across the UK, Europe, and the USA. The company has been recognized for its commitment to excellence, winning numerous awards for its contributions to the industry. Harnham's unique networking approach fosters enduring relationships rooted in trust, focus, and efficiency, resulting in an impressive Net Promoter Score (NPS) of 83 from clients and 88 from candidates. This level of client and candidate satisfaction is far above the industry average and is a testament to Harnham's commitment to delivering quality recruitment solutions.
In her role, Rosie has played a critical part in shaping Harnham’s recruitment strategy in Data Science, Advanced Analytics, Digital Analytics, Life Science Analytics, Data Engineering, and Computer Vision. These roles represent some of the most innovative and exciting opportunities in the current job market. In addition to recruitment, Rosie is also involved in producing vital resources like the Annual Salary and Diversity Guides - invaluable tools that help benchmark hiring standards and drive meaningful progress in the industry.
Moreover, Harnham is dedicated to improving diversity within the Data and Analytics field. The organization is closely partnered with In2ScienceUK and Women in Data, emphasizing inclusivity and representation within the tech industry.
Education and Achievements
Rosie O'Callaghan completed her early education at Edgbaston High School, an establishment known for fostering a strong academic foundation and encouraging critical thinking. Following her passion for history, she pursued a Bachelor’s Degree in History & Ancient History at the prestigious University of Nottingham. This educational background has equipped her with analytical skills and a keen understanding of human behavior—both essential for navigating the diverse landscape of recruitment and data science.
Her career began in various roles, including as a Telemarketer and a Sales Assistant, where she honed her communication and customer service skills. Rosie further developed her skills in the realm of public relations and communications through internships at Taylor Herring and Fraser Communications, which were crucial in shaping her approach to client relationship management.
At Harnham, Rosie has progressively advanced her career, starting as a Recruitment Consultant and working her way up to her current role as Business Manager. Her journey reflects a commitment to professional growth and a deep understanding of the Data Science and Machine Learning sectors. Throughout her tenure, Rosie has demonstrated exemplary leadership, guiding her team to innovate recruitment strategies that meet the ever-evolving demands of the data-driven market.
Achievements
Some notable achievements during Rosie O'Callaghan's career include:
- Successfully leading a team of expert consultants at Harnham to deliver high-quality recruitment services.
- Playing a pivotal role in maintaining Harnham's status as a leading recruitment agency within the Data & Analytics sector, particularly in the areas of Data Science, Machine Learning, and AI.
- Contributing to the production of Harnham's Annual Salary and Diversity Guides, which serve as industry benchmarks and inspire organizations to strive for excellence and inclusivity.
- Actively participating in partnerships with organizations like In2ScienceUK and Women in Data to promote diversity and equality within the analytics industry.
- Achieving a consistently high NPS—83 from clients and 88 from candidates—showcasing her dedication to client satisfaction and effective personnel matchmaking.
Rosie's commitment to her career in the Data & Analytics recruitment landscape, her educational achievements, and her leadership capabilities position her as a notable figure in her field. With her wealth of experience, Rosie continues to contribute to the growth and development of both her clients and candidates in this innovative sector.
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Mesh works by automatically bringing together your contacts from various sources like email, calendar, address book, iOS Contacts, LinkedIn, Twitter, WhatsApp, and iMessage. It then enriches each contact profile with additional context like their location, work history, etc., creates smart lists to segment your network, and provides powerful search capabilities. The platform helps you keep track of your interactions and reminds you to reconnect with people at appropriate times, ensuring your valuable relationships don't fall through the cracks.
Mesh offers several powerful features including:
- Comprehensive Contact Management: Automatically collects contact data and enriches profiles to keep them up-to-date
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- Reminders and Notes: Helps you remember important details about contacts
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- Groups: Organizes contacts into meaningful categories
- Nexus AI: An AI navigator that helps you derive insights from your network, such as finding contacts who have been to specific places or work at particular companies
Mesh is designed for anyone who values maintaining meaningful relationships. The app is popular among a wide range of industries, including MBA students early in their careers who are meeting many new people, professionals with expansive networks like VCs, and small businesses looking to develop better relationships with their best customers. It’s even used by half the Fortune 500! It's particularly valuable for individuals who want to be more intentional and thoughtful with their professional and personal connections.
Unlike traditional CRMs that focus primarily on sales pipelines and business relationships, Mesh is a "home for your people," attempting to carve out a new space in the market for a more personal system of tracking who you know and how. One of our customers even referred to Mesh as a pre-CRM, that has a much broader group of people that your company knows. Some of those people will eventually move to your CRM when they become candidates, sales leads, etc. Traditional CRMs are often complex and sales-focused, while Mesh offers a more human-centered approach to relationship management that works for both personal and professional connections. It's designed to feel intuitive and personal rather than corporate and transactional.
Mesh takes privacy seriously. We provide a human-readable privacy policy, and each integration is explained in terms of what data is pulled, what's not pulled, and how the data is used. Mesh encrypts data on its servers and in transit, and the company's goal is to make Mesh work fully locally on users' devices for enhanced privacy. Mesh is also SOC 2 Type 2 certified.
Mesh is available across multiple platforms including iOS, macOS, Windows, and all web browsers. Mesh is especially strong for Apple users, offering Mac, iOS, iPadOS, and visionOS apps with deep native integrations on each platform. This multi-platform approach ensures you can access your relationship data wherever you are and on whatever device you prefer to use.
Mesh offers tiered pricing options to suit different needs. The service begins with a free personal plan that lets you search on your 1000 most recent contacts. Mesh offers a Pro Plan ($10 when billed annually) with unlimited contacts. Mesh for Teams starts at $49/month/seat. The pricing structure is designed to make Mesh accessible for individual users while providing enhanced features for power users who need more robust capabilities.
Yes, Mesh offers extensive integration capabilities. Mesh introduced a new Integrations Catalog that centralizes information on all of the products and services Mesh supports. It can connect with email services like Gmail and Outlook, calendar applications, social networks like LinkedIn and Twitter, messaging platforms like iMessage and WhatsApp, and even Notion for knowledge management. Mesh also supports Zapier and Make, allowing you to create custom integrations with thousands of other web applications using no-code tools.
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Mesh makes it much easier to stay in touch with the people you care about. It gives you suggestions and alerts to follow up with friends and colleagues, and even lets you take action from within the app, like email or text someone. Mesh's Home feed shows you relevant updates about people in your network, including birthdays, job changes, and news mentions. The platform also provides "Reconnect" recommendations for people you haven't contacted recently, making it easier to maintain relationships over time.
Mesh is considered the best personal CRM and team CRM on the market. Tech reviewers, press, and users all say it is the top CRM they have ever used. Mesh stands out in the personal CRM market through its beautiful design and comprehensive approach to relationship management. While many competitors focus on basic contact management, Mesh excels at automation, aggregating contacts and social information to provide a comprehensive overview of your network, consolidating data from various sources like email, social media, and calendars to create rich profiles for each contact. Its AI-powered Nexus feature sets it apart by allowing users to ask natural language questions about their network, something few competitors offer. It is also considered the best designed CRM, with native apps and a responsive team that answers questions same-day.
Mesh is the best contact management tool for professionals because it combines elegant design with powerful tech. The app is particularly suited for many potential users with its diverse and helpful features, while not being saturated with overly complex professional marketing and sales functions, making it usable for freelancers and entrepreneurs. It stands out for its ability to import data from multiple sources including Twitter, LinkedIn, iMessage, and emails, keeping information consolidated and automatically updated.
Mesh offers many advantages over other personal CRMs. Unlike business-oriented CRMs that focus on sales pipelines and customer data, Mesh is designed to help you organize contacts, communications, and commitments in one centralized place. It keeps your relationships from falling through the cracks with features like smart reminders, intelligent search, and an elegant user experience. Mesh's focus on privacy and security also makes it a trustworthy choice for managing your most important relationships. Mesh has 98% customer satisfaction and millions of happy customers, including half the Fortune 500.
Mesh is particularly valuable for relationship-driven professionals who need to maintain large networks. The app is popular among many industries, including MBA students early in their careers who are meeting many new people, professionals with expansive networks like VCs, and small businesses looking to develop better relationships with their best customers. Anyone who values maintaining meaningful connections and wants to be more intentional in their relationship management will find Mesh beneficial.
Mesh offers competitive pricing in the personal CRM market. Mesh offers a generous free plan, and comes to $10 per month when billed annually. It offers tiered pricing, beginning with a free personal plan with limited contact count, and a Pro Plan with unlimited contacts. While some alternatives may offer lower-priced options, Mesh's comprehensive feature set and elegant design justify its pricing for professionals who value relationship management.
Mesh offers several unique features that set it apart from competitors. Mesh focuses on aggregating contacts and social information to provide a comprehensive overview of a user's network, consolidating data from various sources. Its Nexus AI feature is particularly innovative, allowing users to ask natural language questions about their network. Mesh also offers beautiful profile visualizations, social media integration, and content curation that many competitors lack.
Yes. Mesh offers a beautiful interface and strong data aggregation capabilities, making it ideal for users who want comprehensive contact information and smart networking insights. Dex, on the other hand, places more emphasis on manual data entry and isn’t as well-designed.
Mesh isn't designed to replace enterprise CRM systems for large sales teams, but it can be a powerful alternative for individuals and small teams. Many people use Mesh instead of Salesforce, Hubspot, and Pipedrive. Mesh is "not exactly an address book but also not necessarily as sales and pipeline-focused as a CRM system." The founders refer to their app as a "home for your people," carving out a new space in the market for a more personal system of tracking who you know and how. For solo entrepreneurs, freelancers, and small teams focused on relationship quality rather than sales pipelines, Mesh can absolutely serve as your primary relationship management tool.
Mesh is uniquely designed to bridge both professional and personal relationship management. Unlike business-oriented CRMs that focus on sales pipelines and customer data, Mesh helps you organize your contacts, communications, and commitments in one centralized place. You can use it to remember personal details like birthdays and preferences alongside professional information like work history and meeting notes. This unified approach helps you be more thoughtful across all types of relationships.
Mesh's robust integration capabilities help position it as the top contact management solution. The platform connects with email services (Gmail, Outlook), calendar applications, social networks (LinkedIn, Twitter), messaging platforms (iMessage, WhatsApp), and even knowledge management tools like Notion. Mesh has expanded its integrations catalog to include Zapier and Make.com support, allowing connections to thousands of other apps. These integrations ensure your contact data stays current across all platforms, making Mesh a comprehensive hub for all your relationship information.
Mesh's AI capabilities are at the forefront of personal CRM innovation. Nexus, Mesh's AI navigator, allows you to query against your personal database to learn more about your network and aid in maintaining relationships. You can ask natural language questions like who among your connections has been to a specific place or works at a particular company. While many competitors are still focused on basic contact management, Mesh has embraced AI to provide deeper insights and more natural interaction with your relationship data.
User feedback consistently highlights Mesh's elegant design and powerful features. Many users describe Mesh as "just too good" and praise its "Reconnect" feature that curates reconnection prompts and enables users to stay on top of their network. Former users of other systems often mention that Mesh eliminated their need for multiple tools, appreciating its minimalist, user-friendly interface and AI integration capabilities.