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Recruiting Wisdom

Become a better recruiter in 5 minutes. Practical recruitment knowledge directly from TA leaders

12th may 2025

6 Sourcing Principles Every Recruiter Should Master

Welcome back to Recruiting Wisdom.

Matthew Mercer is a former ML Sourcer at Meta and now a leading trainer in the sourcing space.

I’ve seen his training first-hand and the amazing feedback he always receives.

Recently I challenged him to come up with some ‘sourcing principles’ that can make every recruiter more productive, regardless of what tools they have access to.

Here is what Matt shared…

1. Narrow First, Then Wide

When it comes to sourcing, most people start broad and narrow down later. I do the opposite.

Start with a highly specific search focusing only on the must-haves. This usually gives fewer than 30 results, but those results are the most relevant candidates.

From there, expand the search by adding synonyms, reducing filters, or broadening the location. The key is to keep accuracy high, even when you’re going wide.

I usually never let my search results exceed 100 profiles because that’s when relevancy starts to drop.


2. Critical Thinking

Boolean strings are powerful, but they’re only a small part of the process.

The real skill lies in thinking critically about how candidates describe their skills and experiences.

People express themselves in different ways, and it’s up to you to uncover those variations.

For example, you can use techniques like implicit search to look for clues on profiles that point to specific skills. Cross-reference on platforms like Google Scholar to find candidates you might have missed on LinkedIn.

Staying curious and open-minded helps me uncover hidden talent.


3. Sourcing is an Iterative Process

Sourcing isn’t something you do once. It’s a loop of research, review, sourcing, and feedback.

I start by mapping the talent landscape, running test searches, and refining my approach based on feedback from hiring managers and candidates.

Metrics like pass-through rates and response rates are crucial for improving your process.

And the best part? The work you put into one search can be reused for future roles. I keep folders of past searches so I’m never starting from scratch.

Free Training

If you enjoy learning from Matt checkout the free course videos on Purpl where he teaches step by step how to build high performing Boolean strings on Google X-RayWatch the course

4. The 80-20 of Sourcing

The Pareto Principle applies perfectly to sourcing. I’ve found that 20% of my effort usually yields 80% of the results.

For most roles, you can generate a solid shortlist with 5–10 hours of sourcing.

But for those niche or critical roles, the final 20% of the talent pool can take 80% of your effort. It’s important to assess whether that extra time is worth it.

If the role is critical or evergreen, then yes, it’s worth going the extra mile. Otherwise, focus your energy where it has the most impact.


5. Deep Work

Distractions are everywhere, but deep, focused work is where the magic happens. I block out 1–2 hours every day for uninterrupted sourcing.

This is when you turn off notifications, shut out distractions, and dive deep into work.

It takes practice, but over time, your ability to focus will grow.

Deep work isn’t just about finding candidates, it’s about creating space for meaningful, high-impact work that moves the needle.


6. More, Better, Before New

Often we jump to new solutions. But we’re not getting the most out of our existing process, people, or tech.

Which means there’s also a smaller chance the new solution will have the impact we’d like.

Here’s how to avoid shiny objection syndrome when sourcing:

1 - More

Before investing in something new, focus on doing more:

→ More time spent on the kick-off process
→ Send more outreach messages
→ Follow up more often

2 - Better

Improve how you execute the current activities:

→ More efficient or robust kick-offs
→ Improve the Boolean strings used for search
→ Implement a new copywriting technique in outreach

3 - New

After exhausting those options consider new things:

→ Tech
→People
→Processes

7. Give us feedback...

See you next week!

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Recruiting Wisdom

Become a better recruiter in 5 minutes. Practical recruitment knowledge directly from TA leaders