diff --git a/openldap/group-fixtures.ts b/openldap/group-fixtures.ts
index 518ec6d5..a6298840 100644
--- a/openldap/group-fixtures.ts
+++ b/openldap/group-fixtures.ts
@@ -35,6 +35,29 @@ const data: Jsonify<GroupEntry>[] = [
     externalId: "cn=Cleaners,ou=Janitorial,dc=bitwarden,dc=com",
     name: "Cleaners",
   },
+  {
+    userMemberExternalIds: [
+      "cn=Painterson Miki,ou=Product Development,dc=bitwarden,dc=com",
+      "cn=Virgina Pichocki,ou=Product Development,dc=bitwarden,dc=com",
+      "cn=Steffen Carsten,ou=Product Development,dc=bitwarden,dc=com",
+    ],
+    groupMemberReferenceIds: [],
+    users: [],
+    referenceId: "cn=DevOps Team,dc=bitwarden,dc=com",
+    externalId: "cn=DevOps Team,dc=bitwarden,dc=com",
+    name: "DevOps Team",
+  },
+  {
+    userMemberExternalIds: [
+      "cn=Angus Merizzi,ou=Management,dc=bitwarden,dc=com",
+      "cn=Grissel Currer,ou=Management,dc=bitwarden,dc=com",
+    ],
+    groupMemberReferenceIds: [],
+    users: [],
+    referenceId: "cn=Security Team,dc=bitwarden,dc=com",
+    externalId: "cn=Security Team,dc=bitwarden,dc=com",
+    name: "Security Team",
+  },
 ];
 
 export const groupFixtures = data.map((g) => GroupEntry.fromJSON(g));
diff --git a/openldap/ldifs/directory-20.ldif b/openldap/ldifs/directory-20.ldif
index 62be217a..d0f93ec3 100644
--- a/openldap/ldifs/directory-20.ldif
+++ b/openldap/ldifs/directory-20.ldif
@@ -688,4 +688,27 @@ mobile: +1 804 319-5569
 pager: +1 804 815-3661
 roomNumber: 9273
 manager: cn=Inga Schnirer,ou=Product Testing,dc=bitwarden, dc=com
-secretary: cn=Keven Gilleland,ou=Administrative,dc=bitwarden, dc=com 
+secretary: cn=Keven Gilleland,ou=Administrative,dc=bitwarden, dc=com
+
+# DevOps Team and Security Team identify their members by the member uid attribute,
+# instead of the member Dn attribute.
+# These test that group membership by uid works correctly.
+
+dn: cn=DevOps Team,dc=bitwarden,dc=com
+changetype: add
+cn: DevOps Team
+gidnumber: 800
+memberuid: mikip
+memberuid: pichockv
+memberuid: carstens
+objectclass: posixGroup
+objectclass: top
+
+dn: cn=Security Team,dc=bitwarden,dc=com
+changetype: add
+cn: Security Team
+gidnumber: 900
+memberuid: merizzia
+memberuid: currerg
+objectclass: posixGroup
+objectclass: top
\ No newline at end of file
diff --git a/src/services/ldap-directory.service.ts b/src/services/ldap-directory.service.ts
index b511997e..b08f0a08 100644
--- a/src/services/ldap-directory.service.ts
+++ b/src/services/ldap-directory.service.ts
@@ -118,7 +118,7 @@ export class LdapDirectoryService implements IDirectoryService {
         [delControl],
       );
       return regularUsers.concat(deletedUsers);
-    } catch (e) {
+    } catch {
       this.logService.warning("Cannot query deleted users.");
       return regularUsers;
     }
@@ -192,14 +192,21 @@ export class LdapDirectoryService implements IDirectoryService {
       this.syncConfig.userFilter,
     );
     const userPath = this.makeSearchPath(this.syncConfig.userPath);
-    const userIdMap = new Map<string, string>();
+    const userDnMap = new Map<string, string>();
+    const userUidMap = new Map<string, string>();
     await this.search<string>(userPath, userFilter, (se: any) => {
-      userIdMap.set(this.getReferenceId(se), this.getExternalId(se, this.getReferenceId(se)));
+      const dn = this.getReferenceId(se);
+      const uid = this.getAttr<string>(se, "uid");
+      const externalId = this.getExternalId(se, dn);
+      userDnMap.set(dn, externalId);
+      if (uid != null) {
+        userUidMap.set(uid.toLowerCase(), externalId);
+      }
       return se;
     });
 
     for (const se of groupSearchEntries) {
-      const group = this.buildGroup(se, userIdMap);
+      const group = this.buildGroup(se, userDnMap, userUidMap);
       if (group != null) {
         entries.push(group);
       }
@@ -208,7 +215,20 @@ export class LdapDirectoryService implements IDirectoryService {
     return entries;
   }
 
-  private buildGroup(searchEntry: any, userMap: Map<string, string>) {
+  /**
+   * Builds a GroupEntry from LDAP search results, including membership.
+   * Supports user membership by DN or UID and nested group membership by DN.
+   *
+   * @param searchEntry - The LDAP search entry containing group data
+   * @param userDnMap - Map of user DNs to their external IDs
+   * @param userUidMap - Map of user UIDs to their external IDs
+   * @returns A populated GroupEntry object, or null if the group lacks required properties
+   */
+  private buildGroup(
+    searchEntry: any,
+    userDnMap: Map<string, string>,
+    userUidMap: Map<string, string>,
+  ) {
     const group = new GroupEntry();
     group.referenceId = this.getReferenceId(searchEntry);
     if (group.referenceId == null) {
@@ -228,11 +248,34 @@ export class LdapDirectoryService implements IDirectoryService {
 
     const members = this.getAttrVals<string>(searchEntry, this.syncConfig.memberAttribute);
     if (members != null) {
-      for (const memDn of members) {
-        if (userMap.has(memDn) && !group.userMemberExternalIds.has(userMap.get(memDn))) {
-          group.userMemberExternalIds.add(userMap.get(memDn));
-        } else if (!group.groupMemberReferenceIds.has(memDn)) {
-          group.groupMemberReferenceIds.add(memDn);
+      // Parses a group member attribute and identifies it as a member DN, member Uid, or a group Dn
+      const getMemberAttributeType = (member: string): "memberDn" | "memberUid" | "groupDn" => {
+        const isDnLike = member.includes("=") && member.includes(",");
+        if (isDnLike) {
+          return userDnMap.has(member) ? "memberDn" : "groupDn";
+        }
+        return "memberUid";
+      };
+
+      for (const member of members) {
+        switch (getMemberAttributeType(member)) {
+          case "memberDn": {
+            const externalId = userDnMap.get(member);
+            if (externalId != null) {
+              group.userMemberExternalIds.add(externalId);
+            }
+            break;
+          }
+          case "memberUid": {
+            const externalId = userUidMap.get(member.toLowerCase());
+            if (externalId != null) {
+              group.userMemberExternalIds.add(externalId);
+            }
+            break;
+          }
+          case "groupDn":
+            group.groupMemberReferenceIds.add(member);
+            break;
         }
       }
     }
diff --git a/src/services/sync.service.integration.spec.ts b/src/services/sync.service.integration.spec.ts
index 39cd6ac2..2d56f82c 100644
--- a/src/services/sync.service.integration.spec.ts
+++ b/src/services/sync.service.integration.spec.ts
@@ -123,7 +123,10 @@ describe("SyncService", () => {
       expect(apiService.postPublicImportDirectory).toHaveBeenCalledWith(
         expect.objectContaining({ overwriteExisting: false }),
       );
-      expect(apiService.postPublicImportDirectory).toHaveBeenCalledTimes(6);
+
+      // The expected number of calls may change if more data is added to the ldif
+      // Make sure it equals (number of users / 4) + (number of groups / 4)
+      expect(apiService.postPublicImportDirectory).toHaveBeenCalledTimes(7);
 
       // @ts-expect-error Reset batch size to original state.
       constants.batchSize = originalBatchSize;