diff --git a/fh-joanneum-institute-of-software-design-and-security.csl b/fh-joanneum-institute-of-software-design-and-security.csl
new file mode 100644
index 0000000000..475492680e
--- /dev/null
+++ b/fh-joanneum-institute-of-software-design-and-security.csl
@@ -0,0 +1,230 @@
+<?xml version="1.0" encoding="utf-8"?>
+<style xmlns="http://purl.org/net/xbiblio/csl" version="1.0" class="in-text" demote-non-dropping-particle="sort-only" page-range-format="expanded" default-locale="en-GB">
+  <info>
+    <title>FH JOANNEUM - Institute of Software Design and Security</title>
+    <title-short>FHJ-SWD-Sec</title-short>
+    <id>http://www.zotero.org/styles/fh-joanneum-institute-of-software-design-and-security</id>
+    <link href="http://www.zotero.org/styles/fh-joanneum-institute-of-software-design-and-security" rel="self"/>
+    <link href="http://www.zotero.org/styles/harvard-imperial-college-london" rel="template"/>
+    <link href="https://pages-iit.fh-joanneum.at/iit/typst-thesis-template/doc.html" rel="documentation"/>
+    <author>
+      <name>Ines Internettechnik</name>
+    </author>
+    <contributor>
+      <name>Patrick O'Brien</name>
+    </contributor>
+    <category citation-format="author-date"/>
+    <category field="science"/>
+    <summary>Harvard author-date style for a BA/MA thesis at FH JOANNEUM, Institute of Software Design and Security</summary>
+    <updated>2025-09-29T17:41:04+00:00</updated>
+    <rights license="http://creativecommons.org/licenses/by-sa/3.0/">This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 License</rights>
+  </info>
+  <macro name="editor">
+    <names variable="editor" delimiter=", ">
+      <name and="symbol" delimiter=", "/>
+      <label form="short" prefix=" (" suffix=")"/>
+    </names>
+  </macro>
+  <macro name="anon">
+    <text term="anonymous" form="short" text-case="capitalize-first" strip-periods="true"/>
+  </macro>
+  <macro name="author">
+    <names variable="author">
+      <name and="symbol" name-as-sort-order="first" sort-separator=", " initialize-with="." delimiter-precedes-last="never" delimiter=", "/>
+      <label form="short" prefix=" "/>
+      <substitute>
+        <text macro="editor"/>
+        <text macro="anon"/>
+      </substitute>
+    </names>
+  </macro>
+  <macro name="author-short">
+    <names variable="author">
+      <name form="short" and="text" delimiter=", " delimiter-precedes-last="never"/>
+      <et-al font-style="italic"/>
+      <substitute>
+        <names variable="translator"/>
+        <text macro="anon"/>
+      </substitute>
+    </names>
+  </macro>
+  <macro name="access">
+    <choose>
+      <if variable="DOI">
+        <text variable="DOI" prefix="DOI:"/>
+      </if>
+      <else>
+        <group delimiter=" ">
+          <text variable="URL"/>
+          <group delimiter=": " prefix="[" suffix="]">
+            <text term="accessed" text-case="capitalize-first"/>
+            <date variable="accessed">
+              <date-part name="day" suffix=" "/>
+              <date-part name="month" suffix=" "/>
+              <date-part name="year"/>
+            </date>
+          </group>
+        </group>
+      </else>
+    </choose>
+  </macro>
+  <macro name="title">
+    <choose>
+      <if type="book webpage post post-weblog graphic" match="any">
+        <text variable="title" font-style="italic"/>
+      </if>
+      <else-if variable="container-title" match="none">
+        <text variable="title" font-style="italic"/>
+      </else-if>
+      <else>
+        <text variable="title"/>
+      </else>
+    </choose>
+  </macro>
+  <macro name="publisher">
+    <text variable="publisher"/>
+  </macro>
+  <macro name="year-date">
+    <choose>
+      <if variable="issued">
+        <date variable="issued">
+          <date-part name="year"/>
+        </date>
+      </if>
+      <else>
+        <text term="no date" form="short"/>
+      </else>
+    </choose>
+  </macro>
+  <macro name="edition">
+    <choose>
+      <if is-numeric="edition">
+        <group delimiter=" ">
+          <number variable="edition" form="ordinal"/>
+          <text term="edition" form="short" strip-periods="true"/>
+        </group>
+      </if>
+      <else>
+        <text variable="edition"/>
+      </else>
+    </choose>
+  </macro>
+  <macro name="pages">
+    <group delimiter=" ">
+      <choose>
+        <if type="article-journal" match="none">
+          <label variable="page" form="short"/>
+        </if>
+      </choose>
+      <text variable="page"/>
+    </group>
+  </macro>
+  <macro name="online">
+    <choose>
+      <if variable="URL" match="any">
+        <text term="online" text-case="capitalize-first" prefix="[" suffix="]"/>
+      </if>
+    </choose>
+  </macro>
+  <citation et-al-min="4" et-al-use-first="3" disambiguate-add-year-suffix="true" collapse="year">
+    <layout prefix="(" suffix=")" delimiter="; ">
+      <group delimiter=", ">
+        <text macro="author-short"/>
+        <text macro="year-date"/>
+        <group>
+          <label variable="locator" form="short"/>
+          <text variable="locator"/>
+        </group>
+      </group>
+    </layout>
+  </citation>
+  <bibliography hanging-indent="true" et-al-min="5" et-al-use-first="4" subsequent-author-substitute="---" subsequent-author-substitute-rule="complete-all">
+    <sort>
+      <key macro="author"/>
+      <key variable="title"/>
+    </sort>
+    <layout suffix=".">
+      <group delimiter=". ">
+        <group delimiter=" ">
+          <text macro="author"/>
+          <text macro="year-date" prefix="(" suffix=")"/>
+        </group>
+        <text macro="title" font-style="italic"/>
+        <choose>
+          <if type="thesis">
+            <group delimiter=". ">
+              <text macro="edition"/>
+              <text variable="genre"/>
+              <text macro="online"/>
+              <text macro="publisher"/>
+            </group>
+          </if>
+          <else-if type="webpage post post-weblog" match="any">
+            <group delimiter=". ">
+              <text macro="edition"/>
+              <text macro="online"/>
+            </group>
+          </else-if>
+          <else-if type="article-journal article-newspaper broadcast personal_communication" match="any">
+            <text macro="editor" prefix=" "/>
+            <choose>
+              <if variable="author" match="any">
+                <text variable="container-title" font-style="italic" prefix=" " suffix="."/>
+              </if>
+            </choose>
+            <text macro="online" prefix=" "/>
+            <group prefix=" ">
+              <text variable="volume"/>
+              <group delimiter=", ">
+                <text variable="issue" prefix=" (" suffix=")"/>
+                <text macro="pages"/>
+              </group>
+            </group>
+          </else-if>
+          <else-if type="book graphic" match="any">
+            <group delimiter=". ">
+              <group delimiter=" ">
+                <text variable="collection-title"/>
+                <text variable="collection-number"/>
+              </group>
+              <text macro="edition"/>
+              <text macro="editor"/>
+              <text macro="online"/>
+              <text macro="publisher"/>
+              <text variable="ISBN" prefix="ISBN "/>
+            </group>
+          </else-if>
+          <else-if type="chapter paper-conference" match="any">
+            <group delimiter=". ">
+              <group delimiter=": ">
+                <text term="in" text-case="capitalize-first" suffix=":"/>
+                <text macro="editor"/>
+              </group>
+              <text variable="container-title" font-style="italic"/>
+              <text variable="collection-title"/>
+              <text macro="edition"/>
+              <text macro="online"/>
+              <text macro="publisher"/>
+              <text macro="pages"/>
+            </group>
+          </else-if>
+          <else>
+            <group delimiter=". ">
+              <text macro="editor"/>
+              <text variable="container-title" font-style="italic" prefix=" " suffix="."/>
+              <text macro="online"/>
+              <group delimiter=", ">
+                <group delimiter=" ">
+                  <text variable="volume"/>
+                  <text variable="issue" prefix=" (" suffix=")"/>
+                </group>
+                <text macro="pages"/>
+              </group>
+            </group>
+          </else>
+        </choose>
+        <text macro="access"/>
+      </group>
+    </layout>
+  </bibliography>
+</style>