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495 search results for “ronald systems” in the Staff website

• 
  Ronald Teske ICT manager / guest

  Health, safety and environment

  r.teske@lumc.nl | +31 71 527 8015

• 
  Ronald Grootveld Information Security Officer

  Administration and Central Services

  r.grootveld@bb.leidenuniv.nl | +31 71 527 1574

• 
  Ronald Kluivers Product Owner

  ISSC

  r.j.kluivers@issc.leidenuniv.nl | +31 71 527 7309

• 
  Ronald Romeijn

  Faculteit Geneeskunde

  r.j.romeijn@lumc.nl | +31 71 526 9616

• 
  Ronald Schouten

  Faculteit Geneeskunde

  r.schouten@lumc.nl | 071 5269111

• 
  Ronald Holdinga Audio-visual services staff member

  Universitair Facilitair Bedrijf

  r.holdinga@ufb.leidenuniv.nl | 071 5272727

• 
  Ronald Cramer Professor of Cryptology

  Faculty of Science

  cramer@math.leidenuniv.nl | +31 71 527 7047

• 
  Ronald Walthaus Head of Department Customer Applications Services

  ISSC

  r.f.walthaus@issc.leidenuniv.nl | 06 12345678

• 
  Ronald Kon Guest Researcher

  Faculty of Humanities

  r.e.kon@hum.leidenuniv.nl | 071 5272727

• 
  Ronald Petrarca PhD candidate

  Faculty of Humanities

  r.a.petrarca@umail.leidenuniv.nl | 071 5271646

• 
  Ronald van Os

  Faculteit Geneeskunde

  r.p.van.os@umail.leidenuniv.nl | +31 71 527 2727

• 
  Ronald Bahamondes Álvarez Lecturer

  Social & Behavioural Sciences

  r.a.bahamondes.alvarez@fsw.leidenuniv.nl | +31 71 527 2727

• 
  Ronald van Luijk Professor of Mathematics

  Faculty of Science

  rvl@math.leidenuniv.nl | +31 71 527 7147

• 
  Piet Hein van der Graaf Professor Systems Pharmacology

  Faculty of Science

  p.vandergraaf@lacdr.leidenuniv.nl | +31 71 527 2727

• Mentor-tutor system

  This page provides more information about the mentor-tutor system at Leiden University. What is it? What are its objectives? Where can mentors, tutors, and coordinators find more information and teaching materials?

• Leiden Study System Student success

  Leiden University has a high rate of student success. The Leiden Study System was developed to help students study faster and more effectively. They receive the optimum support while choosing which programme to study and during their studies themselves.

• Historian Ronald Kroeze: 'We must view political integrity from a historical perspective' News - 9 October 2024

  The democratic rule of law is under pressure due to a series of scandals and integrity issues, as seen in the recent parliamentary inquiries. Professor Ronald Kroeze explains: 'Public office holders are expected to show complete dedication, but that norm is quite absolute, and what we mean by it is…

• 
  Marc Spijker Professor emeritus of Numerical mathematics

  Faculty of Science

  spijker@math.leidenuniv.nl | 071 5272727

• 
  Marcel de Jeu Associate professor

  Faculty of Science

  mdejeu@math.leidenuniv.nl | +31 71 527 7118

• Report vulnerabilities in the systems Working securely online

  Leiden University devotes a great deal of attention to the security of its systems. Nevertheless there may still be vulnerabilities in our systems. If you discover such a vulnerability, please let us know as soon as possible.

• 
  Onno van Gaans Assistant professor

  Faculty of Science

  vangaans@math.leidenuniv.nl | +31 71 527 7122

• 
  Hermen Jan Hupkes Professor Non-linear analysis

  Faculty of Science

  hhupkes@math.leidenuniv.nl | +31 71 527 5587

• 
  Nicolas Navarre Postdoc

  Faculty of Science

  n.h.navarre@cml.leidenuniv.nl | +31 71 527 2727

• The new leave system explained Leave

  Since 1 January 2020 - with the transition to the Dutch Civil Code - the system of writing off leave has changed. When you take leave, the system automatically writes off the hours that fall due first.

• 
  Martina Chirilus-Bruckner Assistant Professor

  Faculty of Science

  m.chirilus-bruckner@math.leidenuniv.nl | +31 71 527 4837

• 
  Arjen Doelman Professor of Applied analysis

  Faculty of Science

  doelman@math.leidenuniv.nl | +31 71 527 7123

• 
  Martin Moerings Professor emeritus Penology

  Faculty of Law

  l.m.moerings@law.leidenuniv.nl | +31 71 527 2727

• 
  Shana Hepping PhD candidate

  Faculty of Governance and Global Affairs

  s.l.hepping@fgga.leidenuniv.nl | +31 70 800 9500

• chronology and the reconstruction of the Proto-Indo-European stop systems Event - 19 December 2025

  Lecture, Comparative Indo-European Linguistics (CIEL) Seminars

• 
  Wenyu Wan Researcher

  Social & Behavioural Sciences

  w.wan@fsw.leidenuniv.nl | 071 5272727

• 
  Bartolomeus Häussling Löwgren PhD candidate

  Faculty of Science

  b.j.p.m.haussling.lowgren@cml.leidenuniv.nl | +31 71 527 2727

• Scheduled maintenance educational systems 13 and 19 December Announcement - 27 November 2025

• 
  Fatemeh Mehrafrooz Mayvan PhD candidate

  Faculty of Science

  f.mehrafrooz.mayvan@liacs.leidenuniv.nl | +31 71 527 2727

• 
  Sander Hille Assistant professor

  Faculty of Science

  shille@math.leidenuniv.nl | +31 71 527 7109

• 
  Vivi Rottschäfer Associate professor

  Faculty of Science

  vivi@math.leidenuniv.nl | +31 71 527 7113

• 
  Jennifer Anderson PhD candidate

  Faculty of Science

  j.a.anderson@cml.leidenuniv.nl | +31 71 527 2727

• 
  Kristian Rietveld Assistant professor

  Faculty of Science

  k.f.d.rietveld@liacs.leidenuniv.nl | +31 71 527 7038

• 
  Hai Lin

  Faculty of Science

  h.x.lin@cml.leidenuniv.nl |

• 
  Oliver Taherzadeh Assistant professor

  Faculty of Science

  o.a.taherzadeh@cml.leidenuniv.nl | +31 71 527 2727

• New Basic Administration System BAS InSite goes live on 5 January Announcement - 15 December 2025

• New Basic Administration System BAS InSite goes live on 5 January Announcement - 15 December 2025

• 
  Md Faysal Tareq PhD candidate

  Faculty of Science

  m.f.tareq@cml.leidenuniv.nl | +31 71 527 2727

• 
  Shruti Jain Postdoc

  Faculty of Science

  s.jain@cml.leidenuniv.nl | 071 5272727

• 
  Alexis de Colnet Postdoc

  Faculty of Science

  a.e.h.de.colnet@liacs.leidenuniv.nl | 071 5272727

• 
  Myfel Paluga

  Social & Behavioural Sciences

  m.d.paluga@fsw.leidenuniv.nl | +31 71 527 3451

• 
  Ben Wielstra Associate professor

  Faculty of Science

  b.m.wielstra@biology.leidenuniv.nl | +31 71 527 5135

• 
  Willem Meilink PhD candidate / contract

  Faculty of Science

  w.r.m.meilink@biology.leidenuniv.nl | 071 5274882

• Shadow orders: clandestine non-state power in the international system Event - 20 January 2026

  PhD defence

• No Adolescent Is an Island: Conceptualizing the Family System in Adolescent Depression with the Network Approach Event - 5 February 2026

  PhD defence

• 
  Isabel Siles Asaff PhD candidate

  Faculty of Science

  m.i.siles.asaff@cml.leidenuniv.nl | +31 71 527 2727