O2 / Telefónica Germany
Telecoms
Interim SEO Team Lead – SEO for O2, Blau and Curved. Led 4-person team + 3 agencies, group-wide SEO guidelines and KPI dashboards.
Enterprise SEO · Munich · Active since 2004
Marcell Sarközy
One of Germany's Most Experienced SEO Experts
Founder of Seodeluxe Online Marketing. 22+ years of scalable SEO strategies for major corporations and high-traffic portals – from Technical SEO to AI Search (GEO). Clients include Sixt, Allianz, ADAC, O2 and ProSiebenSat.1.
Ex-Google Quality Rater Top-100 SEO Agency Keynote Speaker
22+
Years in SEO
680+
Websites Optimised
250+
Clients & Brands
×18
Traffic Growth Merkur.de (IVW)
250M
Peak Monthly Impressions (Ippen)
75+
Daily Newspapers
Experience
Career Timeline
2026
Head of SEO
The MUNICH Marketer
SEO & GEO for law firms and tax advisory firms. Built agency's SEO/GEO portfolio, established AI workflows (Claude, Poe), conceived 420-topic content strategy. Articles & talks: Deutscher AnwaltSpiegel, Beck Verlag.
2010–2013
2020–2025
Founder & Owner
Seodeluxe Online Marketing
250+ clients, 680+ websites – incl. Super RTL/TOGGO, Allianz, CAMPWERK. Portals up to 250M visits/month, audits up to 2M sub-pages. 10× iBusiness Top-100 SEO Agency (2011–2020).
2021–2023
Senior SEO Consultant
Mediengruppe Pressedruck
Augsburger Allgemeine: 40 → 50+ Mio. impressions/month. 350+ journalists trained across Main-Post, Südkurier, Allgäuer Zeitung.
2022
Interim SEO Team Lead
Telefónica / O2 Germany
Led 4-person team + 3 external agencies. SEO for O2, Blau and Curved brands. Group-wide SEO guidelines & KPI dashboards. Parallel: Senior SEO Consultant at ADAC (Google News & Discover).
2013–2020
Senior Inhouse SEO · 65 Newspapers
Ippen Digital
Grew SEO impressions from 20 to 250M/month in 7 years. IVW-verified: Merkur.de ×18, tz ×8, WA-Online ×11. Led team of 2 SEOs + 3 working students.
2011–2012
Senior SEO Consultant
Maxdome (ProSiebenSat.1)
SEO for Germany's then-largest video-on-demand platform. Landing page architecture for films & series, editorial SEO guidelines, blog launch.
2008–2010
Head of SEO · International
Sixt AG
Built and led 12-person international team. SEO strategy for 12 core countries + 85 franchise markets. International Sixt blogs (DE/UK/ES/FR/NL).
2006–2008
Head of SEO
PosterXXL AG
First leadership role: SEO strategy for 30,000 landing pages, content & link strategy, reporting to management board.
2005–2006
Google Quality Rater
Google Inc.
Evaluating search results according to official Quality Rater Guidelines – a rare behind-the-scenes view of the ranking algorithm.
Value Proposition
Why Work With Marcell?
Proven at Scale
IVW-verified ×18 traffic growth at Merkur.de. Not theory – documented results for portals with up to 250M visits/month.
Enterprise & International
Led SEO across 97 country markets at Sixt. Deep experience with multilingual, multi-domain and franchise SEO at global scale.
AI Search Ready
Specialised in GEO (Generative Engine Optimization) – visibility in AI Overviews, ChatGPT, Claude and Perplexity.
Publishing Expertise
75+ German daily newspapers – Google News, Google Discover, editorial SEO for newsrooms with 500+ journalists.
Leadership Experience
Led teams of up to 12 people inhouse and interim. Capable of steering agencies, building inhouse teams, running workshops.
Ex-Google Insider
Started as a Google Quality Rater in 2005 – evaluating search results directly for Google. A unique perspective on the algorithm.
Case Studies
Selected Projects
Documented Impact (Source: IVW)
During Marcell's SEO responsibility at Ippen Digital, monthly IVW-verified visits grew significantly: Merkur.de from 5.0 to 89.7M (×18), tz from 6.6 to 52.7M (×8), WA-Online ×11, OVB24 ×6, Kreiszeitung ×5.5.
Source: IVW – comparison 05/2013 to 02/2021.
Sixt AG
Mobility / International
Head of SEO for 12 core countries + 85 franchise markets. 12-person international team. International blogs in 5 languages.
Allianz
Insurance
Regional recruiting success through targeted SEO optimisation of landing pages.
ADAC
Mobility / News
Advisory on Google News & Google Discover strategy. Editorial cluster identification and performance analysis.
Super RTL / TOGGO
Media / Kids
Omnichannel optimisation for young audiences – consolidated position as Germany's leading children's media brand.
ProSiebenSat.1 / Maxdome
Media / Video-on-Demand
Pioneer work in German VOD SEO – landing page structure for films, series and platform content.
Ippen Digital
Publishing · 65 Newspapers
Grew SEO impressions from 20 to 250M/month in 7 years. IVW-verified ×18 at Merkur.de. Co-developed CMS to SEO standards.
PosterXXL
E-Commerce
SEO strategy for 30,000 landing pages. Organic visibility as a market dominance factor in the poster print segment.
CAMPWERK
E-Commerce / Camping
Increased organic visibility in the premium camping segment across multiple European core markets.
Publishers & Daily Newspapers
Editorial and technical SEO for 75+ German daily newspapers – including:
Industry Voices
What Experts Say
„I have known Marcell for more than 18 years. I have always been impressed by his passion for SEO and his friendly personality. A highlight was his interview with me for his podcast SEOs Finest."
Marcus Tober Founder, Searchmetrics „Marcell Sarközy, founder of Seodeluxe, is a true Google SEO veteran – given his history and experience, he has seen it all when it comes to ranking factors."
Karl Kratz Online Marketing Expert „Marcell is a well-known expert in the SEO scene who has experienced everything there is to know in optimisation. The prerequisite for successful work – and on top of that, a genuinely nice and straight-talking guy."
Marco Janck CEO Sumago & SEO Campixx „I got to know Marcell at conferences and events as a highly competent SEO and affiliate marketer. Through his work with major brands and his own projects, he has built extensive expertise across all relevant areas and conveys it in an outstanding way."
Kai Spriestersbach Publisher, SEARCH ONE „Seodeluxe delivers outstanding expert knowledge and proven practical experience – whether for beginners in online marketing or seasoned professionals. In other words: absolutely recommended."
Franz Rohleder Senior SEO Manager, ProSiebenSat.1 „Seodeluxe is the first choice in the German-speaking internet when it comes to online marketing – because its founder Marcell Sarközy is one of the sharpest minds on this topic."
Mariano Glas Founder, Serienjunkies FAQ
Frequently Asked Questions
Who is Marcell Sarközy?
Marcell Sarközy is an Enterprise SEO expert and consultant from the Munich metropolitan area, active in search engine optimisation since 2004. He is the founder of Seodeluxe Online Marketing and has advised more than 250 clients across 680+ websites – from mid-size companies to global corporations such as O2, Sixt, Allianz and ADAC. He started his career as a Google Quality Rater in 2005/2006, evaluating search results directly for Google. Today he is one of Germany's most experienced SEO professionals and a sought-after speaker and author.
What is Marcell Sarközy specialised in?
His focus is Enterprise and High-Traffic SEO: the technical and editorial optimisation of very large websites – up to two million sub-pages – and portals with up to 250 million visits per month. He also covers Technical SEO (Core Web Vitals, page speed, information architecture), international and multilingual SEO, Local SEO, publisher and news SEO for Google News and Google Discover, and AI SEO / GEO (Generative Engine Optimization) – visibility in AI search engines and AI Overviews.
Which brands has Marcell Sarközy worked with?
His client list includes O2/Telefónica, Sixt, Allianz, ADAC, ProSiebenSat.1, Maxdome, Super RTL/TOGGO, PosterXXL and Google. He also worked with 75+ German daily newspapers. During his time at Ippen Digital, IVW-verified monthly visits at Merkur.de grew from 5 to 89.7 million (×18) and at tz from 6.6 to 52.7 million (×8).
Does Marcell Sarközy work with international clients?
Yes. At Sixt he ran international SEO across 12 core countries and 85 franchise markets, leading a 12-person team. He is comfortable working in English and has experience with multilingual, multi-domain and franchise SEO setups. For enquiries, reach out via mail@seodeluxe.de or LinkedIn.
Get in Touch
Reach out via email or LinkedIn. For the full German-language profile visit the main site.