diff --git a/.github/workflows/find-inactive-collaborators.yml b/.github/workflows/find-inactive-collaborators.yml
index 4de6f34691f2cc..2fc2b9036fe6ef 100644
--- a/.github/workflows/find-inactive-collaborators.yml
+++ b/.github/workflows/find-inactive-collaborators.yml
@@ -2,13 +2,13 @@ name: Find inactive collaborators
 
 on:
   schedule:
-    # Run on the 15th day of the month at 4:05 AM UTC.
-    - cron: '5 4 15 * *'
+    # Run every Monday at 4:05 AM UTC.
+    - cron: '5 4 * * 1'
 
   workflow_dispatch:
 
 env:
-  NODE_VERSION: 16.x
+  NODE_VERSION: lts/*
   NUM_COMMITS: 5000
 
 jobs:
diff --git a/.github/workflows/find-inactive-tsc.yml b/.github/workflows/find-inactive-tsc.yml
new file mode 100644
index 00000000000000..978da55dc5c389
--- /dev/null
+++ b/.github/workflows/find-inactive-tsc.yml
@@ -0,0 +1,47 @@
+name: Find inactive TSC members
+
+on:
+  schedule:
+    # Run every Tuesday 12:05 AM UTC.
+    - cron: '5 0 * * 2'
+
+  workflow_dispatch:
+
+env:
+  NODE_VERSION: lts/*
+
+jobs:
+  find:
+    if: github.repository == 'nodejs/node'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout the repo
+        uses: actions/checkout@v2
+
+      - name: Clone nodejs/TSC repository
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+          repository: nodejs/TSC
+          path: .tmp
+
+      - name: Use Node.js ${{ env.NODE_VERSION }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Find inactive TSC members
+        run: tools/find-inactive-tsc.mjs
+
+      - name: Open pull request
+        uses: gr2m/create-or-update-pull-request-action@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GH_USER_TOKEN }}
+        with:
+          author: Node.js GitHub Bot <github-bot@iojs.org>
+          branch: actions/inactive-tsc
+          body: This PR was generated by tools/find-inactive-tsc.yml.
+          commit-message: "meta: move one or more TSC members to emeritus"
+          labels: meta
+          title: "meta: move one or more TSC members to emeritus"
diff --git a/README.md b/README.md
index 8006d57c744491..29f53e6f390f9b 100644
--- a/README.md
+++ b/README.md
@@ -156,8 +156,9 @@ For information on reporting security vulnerabilities in Node.js, see
 For information about the governance of the Node.js project, see
 [GOVERNANCE.md](./GOVERNANCE.md).
 
-<!-- node-core-utils depends on the format of the TSC list. If the
-     format changes, those utilities need to be tested and updated. -->
+<!-- node-core-utils and find-inactive-tsc.mjs depend on the format of the TSC
+     list. If the format changes, those utilities need to be tested and
+     updated. -->
 
 ### TSC (Technical Steering Committee)
 
diff --git a/tools/find-inactive-tsc.mjs b/tools/find-inactive-tsc.mjs
new file mode 100755
index 00000000000000..c141e9026bb306
--- /dev/null
+++ b/tools/find-inactive-tsc.mjs
@@ -0,0 +1,260 @@
+#!/usr/bin/env node
+
+// Identify inactive TSC members.
+
+// From the TSC Charter:
+//   A TSC member is automatically removed from the TSC if, during a 3-month
+//   period, all of the following are true:
+//     * They attend fewer than 25% of the regularly scheduled meetings.
+//     * They do not participate in any TSC votes.
+
+import cp from 'node:child_process';
+import fs from 'node:fs';
+import path from 'node:path';
+import readline from 'node:readline';
+
+const SINCE = +process.argv[2] || '3 months ago';
+
+async function runGitCommand(cmd, options = {}) {
+  const childProcess = cp.spawn('/bin/sh', ['-c', cmd], {
+    cwd: options.cwd ?? new URL('..', import.meta.url),
+    encoding: 'utf8',
+    stdio: ['inherit', 'pipe', 'inherit'],
+  });
+  const lines = readline.createInterface({
+    input: childProcess.stdout,
+  });
+  const errorHandler = new Promise(
+    (_, reject) => childProcess.on('error', reject)
+  );
+  let returnValue = options.mapFn ? new Set() : '';
+  await Promise.race([errorHandler, Promise.resolve()]);
+  // If no mapFn, return the value. If there is a mapFn, use it to make a Set to
+  // return.
+  for await (const line of lines) {
+    await Promise.race([errorHandler, Promise.resolve()]);
+    if (options.mapFn) {
+      const val = options.mapFn(line);
+      if (val) {
+        returnValue.add(val);
+      }
+    } else {
+      returnValue += line;
+    }
+  }
+  return Promise.race([errorHandler, Promise.resolve(returnValue)]);
+}
+
+async function getTscFromReadme() {
+  const readmeText = readline.createInterface({
+    input: fs.createReadStream(new URL('../README.md', import.meta.url)),
+    crlfDelay: Infinity,
+  });
+  const returnedArray = [];
+  let foundTscHeading = false;
+  for await (const line of readmeText) {
+    // If we've found the TSC heading already, stop processing at the next
+    // heading.
+    if (foundTscHeading && line.startsWith('#')) {
+      break;
+    }
+
+    const isTsc = foundTscHeading && line.length;
+
+    if (line === '### TSC (Technical Steering Committee)') {
+      foundTscHeading = true;
+    }
+    if (line.startsWith('* ') && isTsc) {
+      const handle = line.match(/^\* \[([^\]]+)]/)[1];
+      returnedArray.push(handle);
+    }
+  }
+
+  if (!foundTscHeading) {
+    throw new Error('Could not find TSC section of README');
+  }
+
+  return returnedArray;
+}
+
+async function getAttendance(tscMembers, meetings) {
+  const attendance = {};
+  for (const member of tscMembers) {
+    attendance[member] = 0;
+  }
+  for (const meeting of meetings) {
+    // Get the file contents.
+    const meetingFile =
+      await fs.promises.readFile(path.join('.tmp', meeting), 'utf8');
+    // Extract the attendee list.
+    const startMarker = '## Present';
+    const start = meetingFile.indexOf(startMarker) + startMarker.length;
+    const end = meetingFile.indexOf('## Agenda');
+    meetingFile.substring(start, end).trim().split('\n')
+      .map((line) => {
+        const match = line.match(/@(\S+)/);
+        if (match) {
+          return match[1];
+        }
+        console.warn(`Attendee entry does not contain GitHub handle: ${line}`);
+        return '';
+      })
+      .filter((handle) => tscMembers.includes(handle))
+      .forEach((handle) => { attendance[handle]++; });
+  }
+  return attendance;
+}
+
+async function getVotingRecords(tscMembers, votes) {
+  const votingRecords = {};
+  for (const member of tscMembers) {
+    votingRecords[member] = 0;
+  }
+  for (const vote of votes) {
+    // Skip if not a .json file, such as README.md.
+    if (!vote.endsWith('.json')) {
+      continue;
+    }
+    // Get the vote data.
+    const voteData = JSON.parse(
+      await fs.promises.readFile(path.join('.tmp', vote), 'utf8')
+    );
+    for (const member in voteData.votes) {
+      votingRecords[member]++;
+    }
+  }
+  return votingRecords;
+}
+
+async function moveTscToEmeritus(peopleToMove) {
+  const readmeText = readline.createInterface({
+    input: fs.createReadStream(new URL('../README.md', import.meta.url)),
+    crlfDelay: Infinity,
+  });
+  let fileContents = '';
+  let inTscSection = false;
+  let inTscEmeritusSection = false;
+  let memberFirstLine = '';
+  const textToMove = [];
+  let moveToInactive = false;
+  for await (const line of readmeText) {
+    // If we've been processing TSC emeriti and we reach the end of
+    // the list, print out the remaining entries to be moved because they come
+    // alphabetically after the last item.
+    if (inTscEmeritusSection && line === '' &&
+        fileContents.endsWith('>\n')) {
+      while (textToMove.length) {
+        fileContents += textToMove.pop();
+      }
+    }
+
+    // If we've found the TSC heading already, stop processing at the
+    // next heading.
+    if (line.startsWith('#')) {
+      inTscSection = false;
+      inTscEmeritusSection = false;
+    }
+
+    const isTsc = inTscSection && line.length;
+    const isTscEmeritus = inTscEmeritusSection && line.length;
+
+    if (line === '### TSC (Technical Steering Committee)') {
+      inTscSection = true;
+    }
+    if (line === '### TSC emeriti') {
+      inTscEmeritusSection = true;
+    }
+
+    if (isTsc) {
+      if (line.startsWith('* ')) {
+        memberFirstLine = line;
+        const match = line.match(/^\* \[([^\]]+)/);
+        if (match && peopleToMove.includes(match[1])) {
+          moveToInactive = true;
+        }
+      } else if (line.startsWith('  **')) {
+        if (moveToInactive) {
+          textToMove.push(`${memberFirstLine}\n${line}\n`);
+          moveToInactive = false;
+        } else {
+          fileContents += `${memberFirstLine}\n${line}\n`;
+        }
+      } else {
+        fileContents += `${line}\n`;
+      }
+    }
+
+    if (isTscEmeritus) {
+      if (line.startsWith('* ')) {
+        memberFirstLine = line;
+      } else if (line.startsWith('  **')) {
+        const currentLine = `${memberFirstLine}\n${line}\n`;
+        // If textToMove is empty, this still works because when undefined is
+        // used in a comparison with <, the result is always false.
+        while (textToMove[0] < currentLine) {
+          fileContents += textToMove.shift();
+        }
+        fileContents += currentLine;
+      } else {
+        fileContents += `${line}\n`;
+      }
+    }
+
+    if (!isTsc && !isTscEmeritus) {
+      fileContents += `${line}\n`;
+    }
+  }
+
+  return fileContents;
+}
+
+// Get current TSC members, then get TSC members at start of period. Only check
+// TSC members who are on both lists. This way, we don't flag someone who has
+// only been on the TSC for a week and therefore hasn't attended any meetings.
+const tscMembersAtEnd = await getTscFromReadme();
+
+await runGitCommand(`git checkout 'HEAD@{${SINCE}}' -- README.md`);
+const tscMembersAtStart = await getTscFromReadme();
+await runGitCommand('git reset HEAD README.md');
+await runGitCommand('git checkout -- README.md');
+
+const tscMembers = tscMembersAtEnd.filter(
+  (memberAtEnd) => tscMembersAtStart.includes(memberAtEnd)
+);
+
+// Get all meetings since SINCE.
+// Assumes that the TSC repo is cloned in the .tmp dir.
+const meetings = await runGitCommand(
+  `git whatchanged --since '${SINCE}' --name-only --pretty=format: meetings`,
+  { cwd: '.tmp', mapFn: (line) => line }
+);
+
+// Get TSC meeting attendance.
+const attendance = await getAttendance(tscMembers, meetings);
+const lightAttendance = tscMembers.filter(
+  (member) => attendance[member] < meetings.size * 0.25
+);
+
+// Get all votes since SINCE.
+// Assumes that the TSC repo is cloned in the .tmp dir.
+const votes = await runGitCommand(
+  `git whatchanged --since '${SINCE}' --name-only --pretty=format: votes`,
+  { cwd: '.tmp', mapFn: (line) => line }
+);
+
+// Check voting record.
+const votingRecords = await getVotingRecords(tscMembers, votes);
+const noVotes = tscMembers.filter(
+  (member) => votingRecords[member] === 0
+);
+
+const inactive = lightAttendance.filter((member) => noVotes.includes(member));
+
+if (inactive.length) {
+  console.log('\nInactive TSC members:\n');
+  console.log(inactive.map((entry) => `* ${entry}`).join('\n'));
+  console.log('\nGenerating new README.md file...');
+  const newReadmeText = await moveTscToEmeritus(inactive);
+  fs.writeFileSync(new URL('../README.md', import.meta.url), newReadmeText);
+  console.log('Updated README.md generated. Please commit these changes.');
+}