How a skill adjacency matrix helps you fill roles faster, cut costs, and keep your people

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Contents

• The classic recruiting dilemma
• What is skill adjacency mapping?
• Causes and challenges of internal hiring
• The impact of the decision: internal vs. external
• The solution: a skill adjacency matrix for decision-making
• Case study: internal hiring with a pilot program
• Conclusion: reflection and recommendation
• Frequently asked questions

TL;DR

Skill adjacency mapping measures how close your employees' skills are to an open role, and it shows you whether developing people internally or hiring externally is more cost-effective and faster to fill for mid-sized companies. Clear skill profiles and structures are often missing. A skill adjacency matrix makes development paths visible and supports well-grounded staffing decisions.

!Illustration eines Firmengebäudes im Miniaturstil, umgeben von kleinen Figuren. Zwei große Lupen fokussieren auf Mitarbeitende im Gebäude, symbolisch für Talentidentifikation und internes Skill-Mapping.

Author: Dominik Becker · Published: November 21, 2025

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Develop internal talent or hire externally? A strategic decision aid for mid-sized companies.

The classic recruiting dilemma

In recruiting you often face the same choice. Should you develop internal talent or bring in new people from outside? Skill adjacency mapping helps you answer that question. The method weighs the cost of adapting and training people so you can make well-grounded staffing decisions and strengthen retention.

What is skill adjacency mapping?

Definition and relevance

Skill adjacency mapping does not view your employees' skills in binary terms. It measures how close they already are to the qualifications a role needs. This is especially valuable for mid-sized companies, where recruiting resources are limited. A dynamic view of skills lets you get more out of the teams you already have.

From binary thinking to a dynamic view of skills

Employee skills should not be seen as black or white. What matters is recognizing how people can grow toward the skills you need.

Data behind it

According to the Cornerstone People Research Lab, companies that upskill deliberately strengthen retention significantly and build lasting advantages in how they grow their teams. A study by Masterplan and the Quadriga University of Applied Sciences Berlin confirms that upskilling is often more cost-effective than new hires and delivers lasting benefits for team building.

Causes and challenges of internal hiring

Causes

Internal hires often fail because competency profiles are unclear. Many talented people go undiscovered because their potential is never properly captured.

Challenges

Time pressure and missing structures become hurdles when companies shift from quick decisions to strategic skill management. According to Mercer Global Talent Trends, only twelve percent of companies in Germany, Austria, and Switzerland are able to assess which skills their workforce has and which still need to be developed.

The impact of the decision: internal vs. external

Comparing external hiring and internal upskilling

External hires bring fresh perspectives, but also hidden costs. Research from the Society for Human Resource Management (SHRM) shows it costs an average of around $4,700 to hire a new employee, while upskilling people you already have is typically more cost-effective. Upskilling strengthens your culture and builds loyalty, even though it takes more effort up front.

The hidden costs of external hiring

New external hires can drive up onboarding costs, which takes both time and money. According to Deloitte, organizations that invest systematically in internal mobility see significant savings on external hiring costs and better retention rates.

The solution: a skill adjacency matrix for decision-making

Step-by-step guide to building the matrix

1. Analyze existing competency profiles: Capture which skills are already in place.

1. Spot skill proximity and development potential: Identify people who are close to the qualifications you need.

Using tools

Talent management systems and skill mapping tools help you build a clear matrix from existing data and make strategic decisions more easily. These systems use AI-driven analysis to identify internal talent and point out fitting development paths.

Case study: internal hiring with a pilot program

A concrete example

Cisco showed with a skills mapping project how systematically spotting adjacent skills and driving targeted internal mobility can shorten time to fill and lift employee satisfaction. The company mapped its 3,000+ job profiles to more than 200 market-based job roles and identified 20 to 25 critical skills for each one. It is an approach that lets you develop internal talent effectively.

Time and cost math

The long-term efficiency of internal development lowers turnover and strengthens your culture. According to Gloat research on the internal talent marketplace, companies report savings of up to $21 million from better internal mobility and reduced external hiring costs.

Start small. Gain big

A step-by-step rollout of skill adjacency mapping makes it easier to see results and reduces resistance.

Conclusion: reflection and recommendation

A question to reflect on: What potential is sitting in your team, just waiting to be discovered and developed?

A prompt to act: Skill adjacency mapping could be the key to using your internal resources for sustainable company growth.

Find out how skill adjacency mapping can improve your HR strategies. Get more information on internal mobility strategies from Haufe and discover the next steps for your company.

To examine your current recruiting strategies, try our recruiting efficiency self-check to gauge the maturity and performance of your efforts. You can also use practical tools and checklists to optimize your recruiting processes with data and to keep improving your skill adjacency mapping. That way you benefit from focused analysis and concrete, actionable recommendations for your recruiting strategy.

Download the Recruiting KPI Checklist

Recruiting KPI Checklist. Your most important metrics at a glance.

• A clearly structured overview of the most important recruiting KPIs for data-driven recruiting.
• Practical explanations for each KPI: easy to understand and tailored to everyday recruiting.
• A focus on areas to improve. Spot bottlenecks and strengthen your recruiting performance.

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