12 countries led
Marcell Sarközy has worked in search engine optimization since 2004 - technical, enterprise-scale SEO for websites with up to 2 million pages and portals with up to 250 million monthly visits, now extended into AI search (GEO, AEO, LLMO).
Former Google Quality Rater · Conference speaker · Clients include Sixt, Allianz, ADAC, O2, ProSiebenSat.1, Super RTL and more
Fast facts
Merkur.de traffic growth (IVW data)
daily newspapers under one SEO program
countries led at Sixt (12 core + 85 franchise)
Started as a Google Quality Rater
Same period, further titles from the same publishing network also grew significantly: WA-Online × 11 · OVB24 × 6 · Kreiszeitung × 5.5 (IVW).
Trusted by leading brands
12 countries led
News & Discover strategy
Regional recruiting SEO
Interim SEO leadership
VOD SEO pioneer (Maxdome)
Kids-media SEO
75 newspapers, × 18 growth
Ex-Quality Rater
→ See all client work (German)
Why work with me
Technical SEO for websites with up to 2 million pages and portals with up to 250 million monthly visits - a scale most SEO consultants never actually work at.
Seven years of hands-on Google News and Discover work across 75 daily newspapers - a niche discipline few consultants can genuinely claim.
Already advising on GEO, AEO and LLMO and on staying visible in AI Overviews and chat-based search - not just classic SEO.
Former Google Quality Rater (2005-2006): first-hand insight into how Google actually evaluates content and page quality.
Led SEO across 12 core countries and 85 franchise markets for a global brand, managing a 12-person team and multiple external agencies.
20+ years, one person - direct collaboration with the consultant who actually ran these campaigns, not a junior account manager.
Career
SEO and GEO support for law and tax-advisory firms. Strategic consulting on visibility in Google and AI search (AI Overviews, GEO), building a 420-topic content strategy.
Own SEO agency focused on enterprise and high-traffic SEO: technical audits for websites with up to 2 million pages, strategy for portals with up to 250 million monthly visits.
Augsburger Allgemeine: growth from 40 to 50+ million impressions/month. Trained 350+ editors group-wide (incl. Main-Post, Südkurier, Allgäuer Zeitung).
Interim leadership of the SEO function for O2, Blau and Curved. Managed three external agencies, group-wide SEO guidelines, a shared KPI dashboard, and a workshop in Hamburg.
Advised in-house SEOs on Google News & Discover. Topic-cluster identification, editorial workshops, ongoing evaluation via Google Search Console.
Technical and editorial SEO for 75 German daily newspapers (incl. Merkur, tz, HNA, Frankfurter Rundschau). Evolved the in-house CMS around SEO criteria, trained 100+ online editors.
Built the agency with a focus on enterprise and high-traffic SEO, international and local SEO, content strategy and in-house training.
SEO for the video-on-demand provider: on-page analysis, editorial SEO guidelines, dedicated landing pages for films and series, built the Maxdome blog.
International SEO for 12 core and 85 franchise countries. Led a 12-person SEO team, built keyword and link strategies, launched international Sixt blogs.
Built and optimized around 30,000 topic-based subpages, content and link strategy, SEO training for editorial and marketing teams.
Rated websites, images and landing pages directly for Google, per the official Search Quality Rater Guidelines, including page-quality rating and spam detection.
Case studies
2013-2020 · Publishing · 75 daily newspapers
Situation: Ippen Digital’s 75 German daily newspapers had inconsistent technical and editorial SEO practice relative to their potential reach.
Approach: As Senior In-House SEO for seven years, responsible for technical and editorial SEO across all titles (incl. Merkur, tz, HNA, Frankfurter Rundschau) - evolved the in-house CMS around SEO criteria and trained 100+ online editors.
Result: Per IVW data (05/2013-02/2021), Merkur.de grew from 5.0M to 89.7M monthly visits (≈ ×18); tz from 6.6M to 52.7M (≈ ×8). At its peak the network reached roughly 250M visitors/month; one article hit about 6M views - still a record for the newsroom.
2008-2010 · Mobility · 12 core + 85 franchise countries
Situation: Sixt wanted to consistently grow international search visibility across many countries and languages without individual market sites cannibalizing each other.
Approach: As Head of SEO, led a 12-person team responsible for SEO across 12 core and 85 franchise countries - built country-specific keyword and link strategies and launched international Sixt blogs per market.
Result: Consistent, market-differentiated SEO presence across a very broad international portfolio. Detailed figures are covered by a confidentiality agreement.
2022 · Telecommunications · Interim SEO Team Lead
Situation: O2 needed short-term SEO leadership capacity across the O2, Blau and Curved brands, with several external agencies working in parallel without shared guidelines or reporting.
Approach: Interim leadership of the SEO function: managed three external agencies, built group-wide SEO guidelines for all three brands, a shared KPI dashboard, and ran a workshop in Hamburg for internal stakeholders.
Result: Consolidated, cross-brand SEO reporting and consistent guidelines across O2, Blau and Curved. Detailed figures are covered by an NDA with Telefónica.
„The SEO expertise and strategic leadership were exactly what our team needed. In just nine months, not only did our rankings improve significantly, but we also established sustainable processes we still benefit from today."
- Head of Digital Marketing, O2 Germany
2022 · Mobility / News · Google News & Discover
Situation: Germany’s largest mobility club wanted to place editorial content more effectively in Google News and Discover, reaching audiences beyond classic search.
Approach: Advised in-house SEOs on News & Discover, identified topic clusters with Discover potential, ran editorial workshops, and tracked results via Google Search Console.
Result: Sustainably strengthened visibility in Discover and News. Detailed figures are covered by an NDA with ADAC.
2022 · Insurance · Local / regional SEO
Situation: Allianz’s regional recruiting landing pages weren’t achieving the visibility they needed in local search for location-based candidate searches.
Approach: Targeted SEO optimization of regional landing pages: differentiated content per location, avoided internal cannibalization between similar regions, and aligned pages with local search intent rather than generic corporate terms.
Result: Measurably improved regional visibility and a documented recruiting success for the affected locations.
„I had a great experience working with the Seodeluxe team. The SEO optimizations and training sessions were very effective. I can highly recommend them. We would be glad to work with Seodeluxe again."
- Digital Marketing Manager, Allianz Insurance
~2 years · Publishing
Situation: Mediengruppe Pressedruck (Augsburger Allgemeine, Main-Post, Südkurier, Allgäuer Zeitung and others) wanted to grow the digital reach of its newspapers and bring its newsrooms up to speed on SEO.
Approach: About two years of SEO support across multiple publishing titles, including training more than 350 editors group-wide on SEO fundamentals and editorial practice.
Result: Impressions grew from roughly 40 million to over 50 million per month during the engagement.
Recognition
Seodeluxe was ranked among iBusiness’ Top 100 SEO agencies in Germany every year from 2011 to 2020, and named a Top 55 Performance Marketing Agency by iBusiness in 2023. Regular speaker at SMX Munich, SEO Campixx and other industry conferences; certified Ryte Expert and 121WATT Website Usability.
→ Full list of awards & talks (German)
What people say
„Marcell Sarközy is a seasoned veteran of the SEO business and has already proven his skills successfully for many companies."
Marcus Tandler · Founder, Ryte
„I’ve known Marcell aka Seodeluxe for more than 18 years. I’ve always been impressed by his passion for SEO and his friendly presence."
Marcus Tober · Founder, Searchmetrics
„Marcell Sarközy is a genuine Google-SEO veteran and, simply because of his history and experience, has pretty much seen it all when it comes to ranking factors."
Karl Kratz · Online Marketing Expert
Quotes translated from the original German where applicable.
Get in touch
This page is an English-language summary for international contacts. The full site - all case studies, articles and references - is in German at seodeluxe.de.