Sophie is 42. For eighteen years, she managed financing files at a regional bank. Now she wants to move into environmental transition roles: energy renovation, waste management, sustainability consulting. Her problem isn't motivation, nor the qualification she just earned. It's that she knows nobody in this field. No former colleagues, no contacts at all. And between her current job and her family, she has two or three hours a week — at most — to figure out who to reach out to.
If this sounds familiar, your real obstacle isn't knowing how to apply. It's knowing who to apply to. When you switch sectors, you start without the map that years of experience had drawn for you in your previous field. This article explains how to rebuild that map: spotting companies in your new sector near you, turning them into a usable list, and leveraging it to land informational interviews and well-targeted speculative applications.
Why target by sector when changing careers
Because your value, in a career change, doesn't read on your CV — it reads in your ability to understand a specific sector. Targeting by field rather than by posted job listings gives you access to companies that haven't advertised but are hiring, and positions you as an informed candidate rather than an atypical profile that gets filtered out.
Career changes are far from rare. Every year, INSEE counts over a million new business registrations in France: 1,111,200 in 2024 according to INSEE (INSEE Première no. 2037, 2025), up 6%. In other words, the business landscape in your target sector is constantly shifting, and many young companies hire without going through traditional channels. Knowing the players in your target field means plugging directly into that momentum.
The approach is also closely related to that of a job seeker who maps employers in their target area — with one key difference: you filter by activity first, not by geography. That professional filter is what makes all the difference in a career transition.
How to map companies in a sector across your region
The method comes down to one sentence: you start from a type of activity and a geographic area, then list every matching company. Not a case-by-case search, but a complete overview. That's exactly what an on-demand list-building tool based on a professional query makes possible.
In practice, Sophie runs a search along the lines of "thermal engineering consultancy" or "energy renovation contractor" across her region, and in one pass retrieves the name, address, phone number, website, and reviews for each business. That's the core of the Google Maps scraper with CSV export: it turns a map into a workable spreadsheet. Where Sophie would have spent evenings opening individual listings one by one, she gets her full picture in a single operation. This bulk logic is detailed in our guide to building a list of 500 targeted companies in one hour.
France counts 5.2 million businesses in non-agricultural, non-financial market sectors (INSEE, 2023). No static directory accurately reflects the companies in your specific sector and region at any given moment. That's why building your list on demand — from a zone and a profession — is more valuable than buying a pre-packaged database that's already out of date.
The informational interview: your real entry point into the sector
An informational interview (also called a coffee chat or networking meeting) means asking someone in the sector for thirty minutes to understand their work — not to ask for a job. It's far easier to get than a formal interview, because you're only asking for a bit of their time and a shared experience. And when you're making a career change with no existing network, it's the most natural way in.
Real hiring demand is visible sector by sector: France Travail's Besoins en Main-d'Oeuvre (Workforce Needs) survey counts approximately 2.275 million planned hires for 2026, of which 43.8% are considered hard to fill (France Travail, BMO 2026). Those hard-to-fill roles are precisely where a motivated, sector-informed career changer has a real shot. Knowing the players in your target field means connecting directly to that demand, where it actually exists.
Once you have your map, you identify the right person to approach in each company: a team lead, a department manager, someone already doing the role you're aiming for. To find their contact details without a premium subscription, check our method for finding a recruiter's email without LinkedIn Premium. The email finder and social media extraction modules give you contact points starting from the company's own website.
Three or four well-run informational interviews will teach you more about your future sector than weeks of reading. And often, one of them ends with "send me your CV — we're actually looking for someone right now" — which takes you straight into the market of jobs that are never publicly posted.
Building a clean list and personalizing your outreach
A good list isn't a long list — it's an accurate, up-to-date list, enriched with just enough detail to write a message that doesn't look copy-pasted. France Travail is clear on this: for a speculative application, you should avoid generic phrases and show from the very first line that you know the company (France Travail).
In practice, the difference shows up in the opening line. Compare:
- Generic message: "Hello, I am writing to submit my application — motivated and dynamic — as part of my career transition."
- Targeted message: "Hello, I have been following your energy renovation work in the [city] area for several months. After fifteen years in financial analysis, I am transitioning into your field and would love to understand how you structure your field teams."
The second one only works because the list behind it is clean: you know who does what, where, and you have enough to write something that proves you did your homework. To personalize at scale without spending your nights on it, enrich your list before you start writing. Here's what you can add automatically to each company:
| What you add | Why it helps in a career change |
|---|---|
| Legal data (SIRET, executives, legal form) | Understand size and structure before reaching out |
| Brand logo and visuals | Grasp the company's positioning at a glance |
| Website technology stack | Spot a modern company where a cross-functional profile will get read |
| Email deliverability check | Make sure your message actually arrives |
You can chain all these steps into a single operation with a no-code pipeline: start from your professional query and get a clean, enriched, ready-to-use list as output. If your approach targets HR departments in the sector, our guide to finding HR decision-makers' emails in a targeted sector rounds out the method. And if you want to cast a wider net, the logic of sending speculative applications to 200 companies still holds — as long as every message is personalized.
Compliance and respect: using publicly available professional data
Contacting a company whose details are publicly available, on a topic related to its activity, is entirely acceptable. France's data protection authority (CNIL) specifies that reaching out to a professional can be based on legitimate interest when the message relates to their professional role (CNIL), and that generic addresses like contact@ target an organization rather than an individual.
A few common-sense principles apply here as much as the formal rules: you write to people about their work, you're clear about who you are, you make it easy for them to say "no thanks," and you only contact companies whose data is publicly accessible. You're not an aggressive cold caller — you're someone doing serious research into a sector, and that's generally how it comes across. This thoughtful approach is the same one used by a freelancer who finds their first clients without buying a ready-made prospect database: you build your own, from public sources, with respect for the recipients.
FAQ — Career change and targeting companies
Do you need a network to successfully change sectors?
No, but you need to build one. Informational interviews are exactly how you do it: you start from a list of companies in the sector, ask professionals for a bit of their time to understand their work, and build connections where you had none.
Should you target by sector or by geography?
When changing careers, start with the sector, then refine by geography. Your credibility depends on your understanding of the field. Once you have a list of companies in the sector, you can filter by how far you're willing to commute.
How do you find companies in a sector without paying for a directory?
Start with a professional query (the type of activity you're targeting) and a zone, then pull the matching businesses with name, address, phone, and website. You get a current map of your sector without relying on a static database you'd have to pay for.
What should you put in a speculative application when changing fields?
An opening that shows you know the company, a clear link between your past experience and the sector's needs, and zero generic filler. France Travail is emphatic: an application is addressed to a specific employer, never to an anonymous list.
How many companies should you contact in a career change?
Better to aim accurately than broadly. A list of a few dozen well-targeted companies in your sector, with personalized messages, delivers better results than a mass generic send. List quality beats list size.
Is it legal to collect publicly available company contact details?
Yes, for use related to the contacted person's professional activity. The CNIL allows professional outreach on the basis of legitimate interest, provided you identify yourself and make it simple to opt out. Stick to public data and topics related to their work.
This article is part of a larger series: see the guide to prospecting without a SIRET number.
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