Marco Koelmans @mkoelm
Information Security Consultant, CISSP, CISA, CISM, Formula 1 enthusiast and amateur photographer xellentis.nl Joined January 2010-
Tweets4K
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Followers364
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Following273
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Likes64
Na een boeiende presentatie van de High Tech Crime Unit over de takedown van Hansa nu door met DDOS #OneConference2018
A highly respected infosec pro is missing. Who knows more? arjenkamphuis.eu
. @KruidvatService Een klantenservice die klanten geen service mag/kan bieden is geen klantenservice.
Dus je bestelt 6 dagen terug wat bij @Kruidvat @KruidvatService en dat wordt niet tijdig geleverd door problemen daar. Na dit weekend kan ik er niets meer mee en de klantenservice wil geen oplossing bieden maar ook bestelling niet annuleren. #klacht #faal #klantonvriendelijk
NCSC waarschuwt voor misbruik publiek beschikbare memcached-systemen bij DDOS-aanvallen ncsc.nl/actueel/nieuws…
Er stond een trein naar die is zonder de deuren te openen weggereden. Er wordt niets omgeroepen. Vol perron @NS_online 2/2
Hé @NS_online wat is er met de 7:16 naar Schiphol? Wordt niets omgeroepen. 1/2
"Accepteer de nieuwe voorwaarden of accepteer dat je speakers waardeloos worden." #sonos #iot #privacy numrush.nl/2017/08/29/son…
Ook namens mij natuurlijk!
Looking good voor vanmiddag. #SS@TB17
Yeah
Alle regen die vandaag valt is er morgen niet. #security #privacy. ssatb.nl start vanaf 15.00 @CarltonBeach club Scheveningen

Ntisec 𓆣 🏴 @ntisec
4K Followers 5K Following #LongCovid 03-2020, #MECVS sinds 1997, pas diagnose per 01-2021. Daarvoor gaslighting/psychologisering. Niet in beeld. Niet welkom in PostCovid Klinieken.
🦇 @PyroBatNL
3K Followers 2K Following ICT, infosec, privacy, veiligheid. FPM: vuurwerk, explosieven, chemie. Houd van lezen, gamen, chocola 💙Blauw 🦇vliegmuisjes #LEGO *Socialist *Nieuwsgierig
Wim Remes TR @wimremes
17K Followers 3K Following Information Security - People Person - BBQ and general food Amateur - Kindness scales! - Ubukhulu Abubangwa - Building Security You Love
Rex D'Amore @amore_rex66024
6 Followers 169 Following Recruiting webshell en gineers to penet rate websites, with a monthly salary of up to $100,000. If interested, please contact https://t.co/0u6e1iFYyh
The Cyber Elephant in... @CyberElephantB
52 Followers 497 Following @MatGorge, CEO @VigiTrust, author, and Cyber Security expert.
Secora Consulting Ltd @secoraconsult
73 Followers 500 Following Secora Consulting is a professional services company specialising in tailored cybersecurity assessments and cyber advisory services.
Lennaert @lennaert89
2K Followers 3K Following Follow for #infosec #hacking #osint #dfir #bugbounty! | Head Triage @intigriti | ex. @zerocopter | Head CSIRT @divdnl | also: @hacknotcrime @orangecon
BlackKnot Industries @blackknot
77 Followers 139 Following
Cyber Security 🇺�... @stealthlabsinc
2K Followers 5K Following #Stealthlabs is a US-based #InformationSecurity service provider with deep domain expertise in #IAM, #IDM, #IGA, Data Governance, #MSSP and Security Compliance.
ONE Conference @OneConferenceNL
2K Followers 494 Following The ONE Conference is Europe’s prime cybersecurity event. To stay updated, follow us on LinkedIn https://t.co/keQbPvAeqJ
Larry Cortez @TheLarryCortez
265 Followers 3K Following "Everything is designed. Few things are designed well." — Brian Reed
Nel Stout @nel_stout
272 Followers 4K Following "I do not fear computers. I fear lack of them." — Isaac Asimov
Danny van Rijt @DannyRijt
1 Followers 20 Following Safety Engineer from the Netherlands / Sicherheitsingenieur aus den Niederlanden und Wohnhaft in Lübeck.
Frans Hogenkamp @FransHogenkamp
49 Followers 224 Following Pakketbezorger bij A&S Expresse / Nijmegen-Noord / Getrouwd met Thea / Huisdier: duits-mechelse herder
Bob's Business @BobsBusiness
2K Followers 2K Following Award-winning and industry-leading cybersecurity awareness training and phishing simulations provider. Find us at https://t.co/E80YXFgFx8. 📞: 01226 337335
Anneke Bakker @annk68
49 Followers 261 Following Shoppen, lezen, humor, tennis, koken, genieten van de goede dingen des levens :-)
DebugPrivilege @DebugPrivilege
40K Followers 2K Following Windows Nerd | Ex-MSFT | Microsoft MVP in Windows | Interested in Security, Debugging, and Windows Internals.
The Indo-Dutch Cyber ... @IDCSS25
362 Followers 673 Following Official Twitter page of the Indo-Dutch Cyber Security School (IDCSS) | Co-organised by @ccoe_hyd, @DSCI_Connect and @hcssnl | Oct-Nov 2025 | #IDCSS25
Bandy Elhajj @bandyhajj
738 Followers 3K Following
LockedHome @lockedhome
2K Followers 4K Following Home #security and #Smarthome #technology Advice, tips and #Discounts. We'll tell you what you need to know.
BlueFinch @BlueFinch_ICT
204 Followers 725 Following BlueFinch - data protection & compliance | Data Exchange | Data Classification | Data Loss Prevention #ICT #ITmanager #infosec #encryption #CIO #CISO #DLP #MFT
PATRICK CYBERSECURITY @patrick_infosec
47K Followers 48K Following #privacy #security #infosec #hacker #encryption #Marketing #Pentesting #Cybersecurity #Hosting #Server #Technology #Seo #Cloud #Network #Google #forensic #gdpr
leon1969 @Leon1969
6K Followers 2K Following what you see is stripped from context. that is key. -- husband of none. father of six. polygynist. contrarian. dazzles with brilliance. mgtow. @eindspel
Sndr Ptrs @sndrptrs
664 Followers 1K Following happy father | crypto lover | Private Investigator | Rescue Diver | part-time nerd sharing personal interests
Syntenra @Syntenra
11K Followers 9K Following Syntenra Cybersecurity specialises in delivering tailored, cost-effective cybersecurity consultancy to Australian businesses of all sizes
🐘 @therealsaumil@i... @therealsaumil
8K Followers 2K Following Hacker. Speaker. Trainer. Entrepreneur. Traveler. Photographer. Calligrapher. Kite-flyer. Rebel. Made in India 🇮🇳 (vi/vim)
MMC FARMSTEAD @HackerFarmCon
65 Followers 68 Following Twitter account for yearly tech and food event Hackers on The farm . Organized by Paint27 at the MMC Farmstead in Indiana .
4Likes.nl @4LikesNL
53K Followers 54K Following De goedkoopste Nederlandse aanbieder van Likes, Followers en meer!
Suresh S @a_ssuresh
286 Followers 5K Following
Ninja Info-Sec @Hakon2018
694 Followers 5K Following
#ICSSS @icsss_cyber
969 Followers 3K Following International Cyber Security Summer School | August 2022 | @NCIAgency, @EC3Europol, @UniLeiden, @HSD_NL #ICSSS
Jan Martijn Broekhof ... @JanMartijn
2K Followers 4K Following Working non stop to rebelliously increase justice on the worldwide digital infrastructure by offering Guardian360 security as a service
Gaurav @Gaurav02428429
9 Followers 68 Following
Bhavik Shah @Yo_Yo_Bhavik
27 Followers 551 Following
iSOC24 @iSOC24_Global
383 Followers 1K Following
Information Security ... @TNG_InfoSec
1K Followers 899 Following The Information Security Network, produced by The Network Group & designed exclusively for #CISOs & Heads of #InfoSec from leading organisations globally
Erik Rutkens @rutkens
607 Followers 1K Following Husband, proud dad, security dude. Zerocopter. Public speaker. Make software secure. Embrace hackers. Cycling nerd.
Vormetric @Vormetric
9K Followers 7K Following Vormetric was acquired in March 2016 by Thales, the leader in advanced data security solutions and services. Follow us there @thalesesecurity
Ziggy3782SmArTaSs @ziggy3782
18 Followers 387 Following
BUFFERZONE Security @BufferZoneSec
691 Followers 4K Following BUFFERZONE is a patented containment solution that isolates threats to defend #endpoints from #malware, #zerodays, #ransomware, #drivebays and more.
SS@TB @Security_Beach
29 Followers 39 Following
EQ_uinox @EQ_uinox
305 Followers 168 Following Living a #blessed life, in bliss on the other side of my fears.
Education Partners @EducationPrtnr
252 Followers 2K Following Opleiding,informatiebeveiliging,business continuity,IT audit,beste trainingen,aantrekkelijke prijzen,hoogste slagingspercentages, crisismanagement
RoodRisicobeheersing @RoodRisico
307 Followers 1K Following Advies; Training; Information Security; Crisisbeheersing; Crisisteam; Business Continuity; Operational Risk; Compliance, Privacy
YachtSourcingCenter @MelvinYSC
9K Followers 10K Following Altijd aan het doorontwikkelen op het gebied van Recruitment | Op zoek naar de beste professionals
Crossbow Labs @crossbowlabs
371 Followers 399 Following Cybersecurity Boutique - Bespoke solutions for payment security, information privacy, managed security, GRC and products.
Kazi Habib @habibalone09
14K Followers 35K Following
Guido @cyberpionier
21K Followers 2K Following Security Strategist | https://t.co/6ZPLwFVpd6 | Counter-Terrorism | Frm. AIVD Agent | Global Advocate for the #NRF | Author Al-Qaeda 2.0 | Transatlantic Intelligence Consort.
Ntisec 𓆣 🏴 @ntisec
4K Followers 5K Following #LongCovid 03-2020, #MECVS sinds 1997, pas diagnose per 01-2021. Daarvoor gaslighting/psychologisering. Niet in beeld. Niet welkom in PostCovid Klinieken.
🦇 @PyroBatNL
3K Followers 2K Following ICT, infosec, privacy, veiligheid. FPM: vuurwerk, explosieven, chemie. Houd van lezen, gamen, chocola 💙Blauw 🦇vliegmuisjes #LEGO *Socialist *Nieuwsgierig
Victor Gevers @0xDUDE
45K Followers 2K Following (Grumpy Old) Hacker. Co-founder @GDI_FDN. Co-founder @DIVDnl. Co-founder and CEO of https://t.co/Gfgrg51IjY. Unfiltered on https://t.co/6hPoWNR9jw.
Rickey Gevers ⛵️ @UID_
10K Followers 5K Following Exposed 🇷🇺, 🇨🇳, 🇮🇷 & 🇮🇳 state sponsored hackers. Founded @waarneming & others. Currently @responders_now. 4.669; 3.14159. Bitcoin since 2011. Focus 🎯
Wim Remes TR @wimremes
17K Followers 3K Following Information Security - People Person - BBQ and general food Amateur - Kindness scales! - Ubukhulu Abubangwa - Building Security You Love
Günther Steiner 🤬 @BanterSteiner
186K Followers 71 Following Former F1 Team principal. Analyst, Rockstar. Licence to swear. I call things by their fucking name. Don’t follow if you’re under-aged or can’t handle that.
RTL XL @rtlxl
10K Followers 0 Following Op RTL XL kijk je al je favoriete RTL programma's terug. Wil je vooruitkijken óf nog meer films en series zien? Dat doe je bij @Videoland!
ONE Conference @OneConferenceNL
2K Followers 494 Following The ONE Conference is Europe’s prime cybersecurity event. To stay updated, follow us on LinkedIn https://t.co/keQbPvAeqJ
Japke-d. Bouma @Japked
45K Followers 252 Following Columniste @NRC, kantooramazone. Schrijft en houdt presentaties. Te boeken via de DMs van LinkedIn, X en Instagram
Rob van Gameren @VanGamerenF1
78K Followers 526 Following MotoGP-pitreporter en F1 bij @ZiggoSport | 🏍🏎🏀🚴🏻♂️
Arjen Kamphuis @ArjenKamphuis
3K Followers 909 Following Securing all the cybers, Free Software advocate, mountaineer, sailor, carpenter, geek and damn proud of it. PGP KeyID: 0x173F0BCA
Michel van Eeten @bijzinnen
679 Followers 84 Following Michel van Eeten is wetenschapper @TUDelft en schrijver. Nieuwe roman: Heilige middelen. "Het is schrijnend, tegelijk is het intens genieten" **** ELSEVIER
KPN zakelijk @KPNzakelijk
8K Followers 161 Following De officiële Twitter van KPN zakelijk | Tips op het gebied van digitalisering | Hebt u een vraag? Wij zitten voor u klaar ma t/m vrij van 08:00 tot 18:00 uur
NS online @NS_online
257K Followers 8K Following Vanaf 1 juni 2025 zijn we als NS niet meer actief op X, voor al je NS-gerelateerde vragen verwijzen we je graag door naar onze chat op https://t.co/JNJ8tnF0D0 en/of onze NS-app.
Ziggo @ZiggoCompany
36K Followers 56 Following Wil je op de hoogte blijven van ons laatste nieuws en/of servicevragen stellen? Volg Ziggo dan op @ZiggoWebcare.
KPN Webcare @KPNwebcare
66K Followers 22K Following Wij helpen je graag met vragen over onze producten en diensten! https://t.co/LaxtgSqZvH https://t.co/0070iMP6Wi https://t.co/KGGHECTaMZ
KPN @KPN
43K Followers 549 Following De officiële Twitter van KPN | Nieuws, actualiteiten en wetenswaardigheden over KPN | Bent u klant met een vraag over onze diensten? Tweet dan naar @KPNWebcare
Ziggo @ZiggoWebcare
100K Followers 11 Following Maak vandaag fantastisch! 🧡 Hier vertellen wij ons belangrijkste nieuws en kun je 24/7 al je servicevragen aan ons stellen!
AI Revolution @HighTechPro
12K Followers 11K Following We are in the midst of an AI Revolution! #AI #ArtificialIntelligence #MachineLearning & #Cybersecurity - Top #Adviser & #Practitioner #STEM #WomeninAI
Mark Lynd 🎙CISSP I... @mclynd
40K Followers 15K Following 4x CIO & CISO, Military Veteran, Top Ranked Global Thought Leader, Author & Keynote Speaker for CyberSecurity & AI, & GenerativeAI. Exec Leader at Netsync
Syntenra @Syntenra
11K Followers 9K Following Syntenra Cybersecurity specialises in delivering tailored, cost-effective cybersecurity consultancy to Australian businesses of all sizes
🐘 @therealsaumil@i... @therealsaumil
8K Followers 2K Following Hacker. Speaker. Trainer. Entrepreneur. Traveler. Photographer. Calligrapher. Kite-flyer. Rebel. Made in India 🇮🇳 (vi/vim)
Jan Martijn Broekhof ... @JanMartijn
2K Followers 4K Following Working non stop to rebelliously increase justice on the worldwide digital infrastructure by offering Guardian360 security as a service
DebugPrivilege @DebugPrivilege
40K Followers 2K Following Windows Nerd | Ex-MSFT | Microsoft MVP in Windows | Interested in Security, Debugging, and Windows Internals.
Els (@elsmatters.bsky... @ElsMatters
2K Followers 368 Following Filtert weinig en al zeker geen koffie.
Ancilla *flag here* @ncilla
52K Followers 2K Following 🤓 I think, write, research & speak on humanity & technology. Professional ENFP. Leadership coaching 🔥
Katja VH @cyberella101
535 Followers 926 Following * digital * yoga * kattig * hardlopen * cyberdinges * feminist * vegafoodie * biohack * recalcitrant * selectief lief * chocolade *
OpCyberpaint @opcyberpaint
313 Followers 0 Following Paintball: Hackers vs. Anonymous vs. Overheid vs. Infosec. #opcyberpaint
WICS @WomenInCyber
2K Followers 361 Following Account for the Women in Cyber Security network / https://t.co/GlAthKWMs9 /talk nerdy to me/ No we don't want to participate in your hackathon!
NCSC-NL @ncsc_nl
19K Followers 386 Following Wij zijn het Nationaal Cyber Security Centrum. Wij werken aan een digitaal veilig Nederland.
iSOC24 @iSOC24_Global
383 Followers 1K Following
Information Security ... @TNG_InfoSec
1K Followers 899 Following The Information Security Network, produced by The Network Group & designed exclusively for #CISOs & Heads of #InfoSec from leading organisations globally
Erik Rutkens @rutkens
607 Followers 1K Following Husband, proud dad, security dude. Zerocopter. Public speaker. Make software secure. Embrace hackers. Cycling nerd.
Edward Snowden @Snowden
5.7M Followers 1 Following I used to work for the government, but now I work for the public.
Chris Klomp @chrisklomp
82K Followers 3K Following Journalist. Ooit AD, ANP. Werkt nu met donatiemodellen: @realtwitcourt en https://t.co/oxIqMJUCsv. Online Journalist van het Jaar. Nominatie Gouden Freelancer.Carlton Beach @CarltonBeach
858 Followers 396 Following Where business meets pleasure! http://t.co/j8nvLxJDVX
Jaya Baloo @jayabaloo
4K Followers 4K Following
SS@TB @Security_Beach
29 Followers 39 Following
EQ_uinox @EQ_uinox
305 Followers 168 Following Living a #blessed life, in bliss on the other side of my fears.
RoodRisicobeheersing @RoodRisico
307 Followers 1K Following Advies; Training; Information Security; Crisisbeheersing; Crisisteam; Business Continuity; Operational Risk; Compliance, Privacy
Tim Coronel @TimCoronel
947K Followers 116K Following #Dakar2025 #Dakarinsaudi #DakarRally 19th time 🐫🐪🐫🐪🐫 #rally CoronelDakar is a marketing team that happens 2 race Fun is our motto
Max Verstappen @Max33Verstappen
4.0M Followers 301 Following F1 World Champion @redbullracing | Keep Pushing the limits 🦁
Casey Fahey @CaseyFahey
24K Followers 13K Following Coder, Jeweler, Geek, Ally @NetGoalie we make SBOMs easy. #python #django #mongodb #EtsyJewelry #EastVillageBangles 💎 #cats 🐈😸
Politie Gelderland @POL_Gelderland
126K Followers 219 Following Politie Eenheid Oost-Nederland | Provincie Gelderland | Omgeving Tiel, Arnhem, Apeldoorn, Doetinchem | Voor het melden van incidenten belt u 0900-8844 of 112
AIVD @AIVD
22K Followers 2 Following Via @AIVD wordt u op de hoogte gehouden van nieuws over de AIVD. Wij zijn ook te volgen via https://t.co/I5N0wXURAp.
bol @bol_com
110K Followers 15K Following De winkel van ons allemaal. Hulp nodig met je bestelling? 👉 https://t.co/sEaWXNUdLN
Zuk @ihackbanme
17K Followers 1K Following Mobile & Security Research | Founder @ZecOps (Acq. by JAMF) 🐊 & @ZIMPERIUM (Acq.) | #FreeTheSandbox✌ | ❤️ Chess | My random thoughts, only some are accurate.
higefox @higefox
637 Followers 644 Following My tweet are focusing Cyber Security related. Opinions are my own. My favorite keywords are DFIR, REM, APT, OSINT, YARA, CTI. @[email protected]