diff --git a/.github/workflows/codespell.yml b/.github/workflows/codespell.yml
index a84ddbd64..5a5d565ed 100644
--- a/.github/workflows/codespell.yml
+++ b/.github/workflows/codespell.yml
@@ -21,4 +21,4 @@ jobs:
       - uses: codespell-project/actions-codespell@master
         with:
           ignore_words_list: ro,anser,te,tage,afterall,nwe,nin,nd,falsy
-          skip: package-lock.json
+          skip: package-lock.json, deps*, deno.lock
diff --git a/bids-validator/bids-validator-deno b/bids-validator/bids-validator-deno
index d2ba42d53..644fc7564 100755
--- a/bids-validator/bids-validator-deno
+++ b/bids-validator/bids-validator-deno
@@ -1,3 +1,3 @@
-#!/usr/bin/env -S deno run --allow-read --allow-write --allow-env --allow-net --allow-run
+#!/usr/bin/env -S deno run --allow-read --allow-write --allow-env --allow-net --allow-run 
 import './src/bids-validator.ts'
 
diff --git a/bids-validator/src/deps/hed-validator.ts b/bids-validator/src/deps/hed-validator.ts
new file mode 100644
index 000000000..9726c10d5
--- /dev/null
+++ b/bids-validator/src/deps/hed-validator.ts
@@ -0,0 +1 @@
+export { default } from "https://esm.sh/hed-validator@3.15.3?deps=node@18"
diff --git a/bids-validator/src/issues/list.ts b/bids-validator/src/issues/list.ts
index 87f1239e3..2d603a286 100644
--- a/bids-validator/src/issues/list.ts
+++ b/bids-validator/src/issues/list.ts
@@ -120,4 +120,42 @@ export const filenameIssues: IssueDefinitionRecord = {
   },
 }
 
-export const nonSchemaIssues = { ...filenameIssues }
+const hedIssues: IssueDefinitionRecord = {
+  HED_ERROR: {
+    severity: 'error',
+    reason: 'The validation on this HED string returned an error.',
+  },
+  HED_WARNING: {
+    severity: 'warning',
+    reason: 'The validation on this HED string returned a warning.',
+  },
+  HED_INTERNAL_ERROR: {
+    severity: 'error',
+    reason: 'An internal error occurred during HED validation.',
+  },
+  HED_INTERNAL_WARNING: {
+    severity: 'warning',
+    reason: 'An internal warning occurred during HED validation.',
+  },
+  HED_MISSING_VALUE_IN_SIDECAR: {
+    severity: 'warning',
+    reason:
+      'The json sidecar does not contain this column value as a possible key to a HED string.',
+  },
+  HED_VERSION_NOT_DEFINED: {
+    severity: 'warning',
+    reason:
+      "You should define 'HEDVersion' for this file. If you don't provide this information, the HED validation will use the latest version available.",
+  },
+}
+
+export const hedOldToNewLookup: Record<number, Partial<keyof IssueDefinitionRecord>> = {
+  104: 'HED_ERROR',
+  105: 'HED_WARNING',
+  106: 'HED_INTERNAL_ERROR',
+  107: 'HED_INTERNAL_WARNING',
+  108: 'HED_MISSING_VALUE_IN_SIDECAR',
+  109: 'HED_VERSION_NOT_DEFINED'
+}
+
+export const nonSchemaIssues = { ...filenameIssues, ...hedIssues }
diff --git a/bids-validator/src/tests/local/hed-integration.test.ts b/bids-validator/src/tests/local/hed-integration.test.ts
new file mode 100644
index 000000000..07a51b903
--- /dev/null
+++ b/bids-validator/src/tests/local/hed-integration.test.ts
@@ -0,0 +1,62 @@
+import { formatAssertIssue, validatePath } from './common.ts'
+import { assert, assertEquals } from '../../deps/asserts.ts'
+import { BIDSFileDeno, readFileTree } from '../../files/deno.ts'
+import { DatasetIssues } from '../../issues/datasetIssues.ts'
+import { loadSchema } from '../../setup/loadSchema.ts'
+import { BIDSContext, BIDSContextDataset } from '../../schema/context.ts'
+import { BIDSFile, FileTree } from '../../types/filetree.ts'
+import { GenericSchema } from '../../types/schema.ts'
+import { hedValidate } from '../../validators/hed.ts'
+
+function getFile(fileTree: FileTree, path: string) {
+  let [current, ...nextPath] = path.split('/')
+  if (nextPath.length === 0) {
+    const target = fileTree.files.find(x => x.name === current)
+    if (target) {
+      return target
+    }
+    const dirTarget = fileTree.directories.find(x => x.name === nextPath[0]) 
+    return dirTarget
+  } else {
+    const nextTree = fileTree.directories.find(x => x.name === current)
+    if (nextTree) {
+      return getFile(nextTree, nextPath.join('/'))
+    }
+  }
+  return undefined
+}
+
+Deno.test('hed-validator not triggered', async (t) => {
+  const PATH = 'tests/data/bids-examples/ds003'
+  const tree = await readFileTree(PATH)
+  const schema = await loadSchema()
+  const issues = new DatasetIssues()
+  const dsContext = new BIDSContextDataset(undefined, {'HEDVersion': ['bad_version']})
+  await t.step('detect hed returns false', async () => {
+    const eventFile = getFile(tree, 'sub-01/func/sub-01_task-rhymejudgment_events.tsv')
+    assert(eventFile !== undefined)
+    assert(eventFile instanceof BIDSFileDeno)
+    const context = new BIDSContext(tree, eventFile, issues, dsContext)
+    await context.asyncLoads()
+    await hedValidate(schema as unknown as GenericSchema, context)
+    assert(issues.size === 0)
+  })
+})
+
+Deno.test('hed-validator fails with bad schema version', async (t) => {
+  const PATH = 'tests/data/bids-examples/eeg_ds003645s_hed_library'
+  const tree = await readFileTree(PATH)
+  const schema = await loadSchema()
+  const issues = new DatasetIssues()
+  const dsContext = new BIDSContextDataset(undefined, {'HEDVersion': ['bad_version']})
+  await t.step('detect hed returns false', async () => {
+    const eventFile = getFile(tree, 'sub-002/eeg/sub-002_task-FacePerception_run-3_events.tsv')
+    assert(eventFile !== undefined)
+    assert(eventFile instanceof BIDSFileDeno)
+    const context = new BIDSContext(tree, eventFile, issues, dsContext)
+    await context.asyncLoads()
+    await hedValidate(schema as unknown as GenericSchema, context)
+    assert(issues.size === 1)
+    assert(issues.has('HED_ERROR'))
+  })
+})
diff --git a/bids-validator/src/types/check.ts b/bids-validator/src/types/check.ts
index 704a5b0c9..081d7e966 100644
--- a/bids-validator/src/types/check.ts
+++ b/bids-validator/src/types/check.ts
@@ -1,8 +1,9 @@
 import { GenericSchema } from './schema.ts'
-import { BIDSContext } from '../schema/context.ts'
+import { BIDSContext, BIDSContextDataset } from '../schema/context.ts'
+import { DatasetIssues } from '../issues/datasetIssues.ts'
 
 /** Function interface for writing a check */
-export type CheckFunction = (
+export type ContextCheckFunction = (
   schema: GenericSchema,
   context: BIDSContext,
 ) => Promise<void>
@@ -13,3 +14,9 @@ export type RuleCheckFunction = (
   schema: GenericSchema,
   context: BIDSContext,
 ) => void
+
+export type DSCheckFunction = (
+  schema: GenericSchema,
+  dsContext: BIDSContextDataset,
+  issues: DatasetIssues,
+) => Promise<void>
diff --git a/bids-validator/src/types/context.ts b/bids-validator/src/types/context.ts
index f13d34041..24c014b11 100644
--- a/bids-validator/src/types/context.ts
+++ b/bids-validator/src/types/context.ts
@@ -5,6 +5,7 @@ export interface ContextDatasetSubjects {
   participant_id?: string[]
   phenotype?: string[]
 }
+
 export interface ContextDataset {
   dataset_description: Record<string, unknown>
   files: any[]
diff --git a/bids-validator/src/validators/bids.ts b/bids-validator/src/validators/bids.ts
index 7518eeecd..96655365c 100644
--- a/bids-validator/src/validators/bids.ts
+++ b/bids-validator/src/validators/bids.ts
@@ -1,4 +1,4 @@
-import { CheckFunction } from '../types/check.ts'
+import { DSCheckFunction, ContextCheckFunction } from '../types/check.ts'
 import { BIDSFile, FileTree } from '../types/filetree.ts'
 import { IssueFile } from '../types/issues.ts'
 import { GenericSchema } from '../types/schema.ts'
@@ -14,17 +14,21 @@ import { DatasetIssues } from '../issues/datasetIssues.ts'
 import { emptyFile } from './internal/emptyFile.ts'
 import { BIDSContext, BIDSContextDataset } from '../schema/context.ts'
 import { parseOptions } from '../setup/options.ts'
+import { hedValidate } from './hed.ts'
 
 /**
  * Ordering of checks to apply
  */
-const CHECKS: CheckFunction[] = [
+const perContextChecks: ContextCheckFunction[] = [
   emptyFile,
   filenameIdentify,
   filenameValidate,
   applyRules,
+  hedValidate,
 ]
 
+const perDSChecks: DSCheckFunction[] = []
+
 /**
  * Full BIDS schema validation entrypoint
  */
@@ -84,11 +88,14 @@ export async function validate(
     }
     await context.asyncLoads()
     // Run majority of checks
-    for (const check of CHECKS) {
+    for (const check of perContextChecks) {
       await check(schema as unknown as GenericSchema, context)
     }
     await summary.update(context)
   }
+  for (const check of perDSChecks) {
+    await check(schema as unknown as GenericSchema, dsContext, issues)
+  }
 
   let derivativesSummary: Record<string, ValidationResult> = {}
   await Promise.allSettled(
diff --git a/bids-validator/src/validators/filenameValidate.ts b/bids-validator/src/validators/filenameValidate.ts
index 6e5b2e964..23e1a4076 100644
--- a/bids-validator/src/validators/filenameValidate.ts
+++ b/bids-validator/src/validators/filenameValidate.ts
@@ -1,4 +1,4 @@
-import { CheckFunction, RuleCheckFunction } from '../types/check.ts'
+import { ContextCheckFunction, RuleCheckFunction } from '../types/check.ts'
 import { DatasetIssues } from '../issues/datasetIssues.ts'
 import { BIDSContext } from '../schema/context.ts'
 import { Entity, Format, GenericSchema, Schema } from '../types/schema.ts'
@@ -7,7 +7,7 @@ import { hasProp } from '../utils/objectPathHandler.ts'
 
 const sidecarExtensions = ['.json', '.tsv', '.bvec', '.bval']
 
-const CHECKS: CheckFunction[] = [
+const CHECKS: ContextCheckFunction[] = [
   missingLabel,
   atRoot,
   entityLabelCheck,
diff --git a/bids-validator/src/validators/hed.ts b/bids-validator/src/validators/hed.ts
new file mode 100644
index 000000000..e241c20d8
--- /dev/null
+++ b/bids-validator/src/validators/hed.ts
@@ -0,0 +1,110 @@
+import hedValidator from '../deps/hed-validator.ts'
+import { hedOldToNewLookup } from '../issues/list.ts'
+import { GenericSchema } from '../types/schema.ts'
+import { IssueFile, IssueFileOutput } from '../types/issues.ts'
+import { BIDSContext, BIDSContextDataset } from '../schema/context.ts'
+import { DatasetIssues } from '../issues/datasetIssues.ts'
+import { ColumnsMap } from '../types/columns.ts'
+
+function sidecarHasHed(sidecarData: BIDSContext["sidecar"]) {
+  if (!sidecarData) {
+    return false
+  }
+  return Object.keys(sidecarData).some(x => sidecarValueHasHed(sidecarData[x]))
+}
+
+function sidecarValueHasHed(sidecarValue: unknown) {
+  return (
+    sidecarValue !== null &&
+    typeof sidecarValue === 'object' &&
+    'HED' in sidecarValue &&
+    sidecarValue.HED !== undefined
+  )
+}
+
+let hedSchemas: object | undefined | null = undefined
+
+async function setHedSchemas(datasetDescriptionJson = {}) {
+  const datasetDescriptionData = new hedValidator.bids.BidsJsonFile(
+    '/dataset_description.json',
+    datasetDescriptionJson,
+    null,
+  )
+  try {
+    hedSchemas = await hedValidator.bids.buildBidsSchemas(
+      datasetDescriptionData,
+      null,
+    )
+    return [] as HedIssue[]
+  } catch (issueError) {
+    hedSchemas = null
+    return hedValidator.bids.BidsHedIssue.fromHedIssues(
+      issueError,
+      datasetDescriptionData.file,
+    )
+  }
+}
+
+export interface HedIssue {
+  code: number
+  file: IssueFile
+  evidence: string
+}
+
+export async function hedValidate(
+  schema: GenericSchema,
+  context: BIDSContext,
+): Promise<void> {
+  let file
+  let hedValidationIssues = [] as HedIssue[]
+
+  try {
+    if (context.extension == '.tsv' && context.columns) {
+      if (!('HED' in context.columns) && !sidecarHasHed(context.sidecar)) {
+        return
+      }
+      hedValidationIssues = await setHedSchemas(context.dataset.dataset_description)
+
+      file = await buildHedTsvFile(context)
+    } else if (context.extension == '.json' && sidecarHasHed(context.json)) {
+      hedValidationIssues = hedValidationIssues = await setHedSchemas(context.dataset.dataset_description)
+      file = buildHedSidecarFile(context)
+    }
+
+    if (file !== undefined) {
+      hedValidationIssues.push(...file.validate(hedSchemas))
+    }
+  } catch (error) {
+    context.issues.addNonSchemaIssue('HED_ERROR', [{ ...context.file, evidence: error}])
+  }
+
+  hedValidationIssues.map((hedIssue) => {
+    const code = hedIssue.code
+    if (code in hedOldToNewLookup) {
+      context.issues.addNonSchemaIssue(
+        hedOldToNewLookup[code],
+        [{ ...hedIssue.file, evidence: hedIssue.evidence }],
+      )
+    }
+  })
+}
+
+function buildHedTsvFile(context: BIDSContext)  {
+  const eventFile = new hedValidator.bids.BidsTsvFile(
+    context.path,
+    context.columns,
+    context.file,
+    [],
+    context.sidecar,
+  )
+  return eventFile
+}
+
+function buildHedSidecarFile(context: BIDSContext) {
+  const sidecarFile = new hedValidator.bids.BidsSidecar(
+    context.path,
+    context.json,
+    context.file,
+  )
+  return sidecarFile
+}
diff --git a/bids-validator/src/validators/internal/emptyFile.ts b/bids-validator/src/validators/internal/emptyFile.ts
index 878e148a1..25ef3bd32 100644
--- a/bids-validator/src/validators/internal/emptyFile.ts
+++ b/bids-validator/src/validators/internal/emptyFile.ts
@@ -1,7 +1,7 @@
-import { CheckFunction } from '../../types/check.ts'
+import { ContextCheckFunction } from '../../types/check.ts'
 
 // Non-schema EMPTY_FILE implementation
-export const emptyFile: CheckFunction = (schema, context) => {
+export const emptyFile: ContextCheckFunction = (schema, context) => {
   if (context.file.size === 0) {
     context.issues.addNonSchemaIssue('EMPTY_FILE', [context.file])
   }
diff --git a/bids-validator/src/validators/isBidsy.ts b/bids-validator/src/validators/isBidsy.ts
index bc55b70e4..a2a7ccaaa 100644
--- a/bids-validator/src/validators/isBidsy.ts
+++ b/bids-validator/src/validators/isBidsy.ts
@@ -4,11 +4,11 @@
  */
 // @ts-nocheck
 import { BIDSContext } from '../schema/context.ts'
-import { CheckFunction } from '../../types/check.ts'
+import { ContextCheckFunction } from '../../types/check.ts'
 import { BIDSFile } from '../types/filetree.ts'
 import { Schema } from '../types/schema.ts'
 
-export const isBidsyFilename: CheckFunction = (schema, context) => {
+export const isBidsyFilename: ContextCheckFunction = (schema, context) => {
   // every '.', '-', '_' followed by an alnum
   // only contains '.', '-', '_' and alnum
 }