```xml
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="https://www.sitemaps.org/schemas/sitemap/0.9">

    <!-- Page d'accueil -->
    <url>
        <loc>https://www.global-isystems.com/</loc>
        <lastmod>2026-06-10</lastmod>
        <changefreq>weekly</changefreq>
        <priority>1.0</priority>
    </url>
    <url>
        <loc>https://www.global-isystems.com/index.html</loc>
        <lastmod>2026-06-10</lastmod>
        <changefreq>weekly</changefreq>
        <priority>1.0</priority>
    </url>

    <!-- Prestations -->
    <url>
        <loc>https://www.global-isystems.com/electricite.html</loc>
        <lastmod>2026-06-10</lastmod>
        <changefreq>monthly</changefreq>
        <priority>0.9</priority>
    </url>
    <url>
        <loc>https://www.global-isystems.com/reseaux.html</loc>
        <lastmod>2026-06-10</lastmod>
        <changefreq>monthly</changefreq>
        <priority>0.9</priority>
    </url>
    <url>
        <loc>https://www.global-isystems.com/securite.html</loc>
        <lastmod>2026-06-10</lastmod>
        <changefreq>monthly</changefreq>
        <priority>0.9</priority>
    </url>
    <url>
        <loc>https://www.global-isystems.com/energie.html</loc>
        <lastmod>2026-06-10</lastmod>
        <changefreq>monthly</changefreq>
        <priority>0.9</priority>
    </url>

    <!-- Services -->
    <url>
        <loc>https://www.global-isystems.com/services.html</loc>
        <lastmod>2026-06-10</lastmod>
        <changefreq>monthly</changefreq>
        <priority>0.9</priority>
    </url>

    <!-- Références -->
    <url>
        <loc>https://www.global-isystems.com/references.html</loc>
        <lastmod>2026-06-10</lastmod>
        <changefreq>monthly</changefreq>
        <priority>0.8</priority>
    </url>

    <!-- Recrutement -->
    <url>
        <loc>https://www.global-isystems.com/recrutement.html</loc>
        <lastmod>2026-06-10</lastmod>
        <changefreq>monthly</changefreq>
        <priority>0.7</priority>
    </url>

    <!-- Contact -->
    <url>
        <loc>https://www.global-isystems.com/contact.html</loc>
        <lastmod>2026-06-10</lastmod>
        <changefreq>yearly</changefreq>
        <priority>0.8</priority>
    </url>

</urlset>
```