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Mail Clerks and Mail Machine Operators, Except Postal Service

SOC 43-9051.00Job Zone 2 · Some Preparationv.26.05

Context coveredThis framework covers mail handling, sorting, postage application, package preparation, and mail technology operation in office and administrative support environments ranging from small departmental mailrooms to large multi-site organizational mail centers.

Sources:O*NET v30.2O*NET Resource Center — Occupational Information Network, v30.2 (Sept 2025). Opens in new tab.SkillsCrosswalkSkillsCrosswalk — O*NET enrichment + adjacency index. Opens in new tab.
Emerging
Entry / Apprentice
  1. Package wrapping and tying procedures — execute under direct supervision using hand tools and tying machines in a mailroom setting.
  2. Envelope sealing tasks — perform by hand or with basic sealing machines under close guidance in an office mail center.
  3. Outgoing mail — collect from designated pickup points and deliver to sorting areas following established step-by-step procedures.
  4. Postage meters and hand-stamping tools — apply postage to letters and packages under supervisor direction in a moderate-volume mail facility.
  5. Incoming mail bundles — sort into basic categories using labeled bins and routing guides provided by a supervisor.
  6. Mailing addresses and postage markings — check for obvious errors on outgoing envelopes following a supervisor-provided checklist.
  7. Mail carts — load and transport sorted mail containers to designated drop zones according to standard route instructions.
  8. Inbound parcels from couriers — receive and count against a manifest under direct oversight in a receiving dock area.
  9. Basic mailing and shipping software — enter routine package data following step-by-step instructions in a clerical mail environment.
  10. Workplace safety and handling guidelines — follow posted protocols for lifting and moving mail containers in a mailroom under supervision.
Developing
Mid-level / Established
  1. Packages and parcels — wrap, tie, and prepare for shipment independently using both hand methods and tying machines in a mid-size mail center.
  2. Outgoing mail preparation — determine appropriate postage class and delivery method for routine correspondence with minimal supervisor input.
  3. Sorted mail containers — remove and transfer to correct departmental zones on schedule using established routing procedures across a multi-floor facility.
  4. Incoming and outgoing mail flow — manage daily sort and collection cycles, including cart routing, with consistent accuracy and on-time completion.
  5. Postage metering equipment — calibrate and operate to apply correct postage across varied mail classes in a routine office mailing operation.
  6. Address accuracy and condition standards — verify items from large-volume mailers meet formatting and packaging requirements before processing.
  7. Inbound shipments from contractors and couriers — accept, inspect, and reconcile against delivery documentation in a receiving environment.
  8. Mailing and shipping software — input package records, generate labels, and track outgoing items for standard departmental mailings.
  9. Time management across competing mail tasks — prioritize sorting, sealing, and delivery duties to meet departmental deadlines with reduced oversight.
  10. Customer service communication — respond to staff inquiries about mail status and delivery timelines clearly and professionally in an office environment.
Proficient
Senior / Expert IC
  1. Complex mail preparation workflows — independently manage wrapping, postage application, and dispatch for high-volume or time-sensitive organizational mailings.
  2. Non-routine addressing and postage problems — identify and resolve discrepancies in recipient information or postage class without escalating to a supervisor.
  3. Multi-carrier shipment options — evaluate cost and transit time trade-offs across postal and courier services to recommend optimal delivery methods.
  4. Large-volume mailer submissions — audit containers from external mailers or contractors for compliance with postal regulations and internal quality standards.
  5. Mail routing irregularities — diagnose and correct misrouted or delayed items by cross-referencing tracking systems and departmental directories.
  6. Automated mail processing equipment — operate and monitor envelope-sealing and labeling machines, adjusting settings to maintain throughput and quality.
  7. Mailing database and software systems — query, update, and generate reports from shipping software to support departmental recordkeeping and audits.
  8. Seasonal or surge mail volumes — adapt sorting and dispatch schedules autonomously to sustain service levels during peak operational periods.
  9. Cross-departmental coordination — liaise with administrative, procurement, and facilities teams to align mail schedules with broader organizational timelines.
  10. Problem sensitivity in mail processing — detect damaged, suspicious, or improperly documented packages and apply established security or escalation protocols.
Advanced
Lead / Principal / Executive
  1. Mailroom operating procedures — design, document, and implement standardized workflows covering intake, sorting, postage, and dispatch for an entire organization.
  2. Staff training and onboarding — develop and deliver competency-based instruction for new mail clerks and machine operators across all core task areas.
  3. Mailing and shipping vendor relationships — negotiate service agreements with couriers and postage vendors to optimize cost, reliability, and compliance.
  4. Mail technology infrastructure — evaluate, select, and oversee implementation of mailing software, postage meters, and automated processing equipment.
  5. Quality assurance program — establish audit cycles and performance metrics to monitor address accuracy, postage compliance, and delivery timeliness across the mailroom.
  6. Budget planning for mail operations — forecast postage expenditure, equipment maintenance costs, and staffing needs across annual and multi-year cycles.
  7. Regulatory compliance oversight — ensure all outgoing and incoming mail and parcel handling meets applicable postal, customs, and organizational security standards.
  8. Continuous improvement initiatives — lead process reviews that identify bottlenecks in mail handling and implement solutions that measurably increase throughput.
  9. Crisis and contingency planning — develop and activate backup procedures for equipment failures, courier disruptions, or surge volumes that affect mail service continuity.
  10. Organizational mail policy — author and enforce policies governing acceptable use, data handling in shipping systems, and records retention for mail documentation.

AI-at-Work Competency Framework

Sources:Anthropic Economic IndexAnthropic Economic Index — release_2026_03_24. Opens in new tab.Jadhav & Danve, 2026Skill Automation Feasibility Index — Jadhav & Danve, 2026 (arXiv:2604.06906). Opens in new tab.WEF Skills TaxonomyWEF Skills Taxonomy 2021 — Building a Common Language for Skills at Work. Opens in new tab.

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Sources:Pathsmith™ Durable SkillsPathsmith™ Durable Skills Framework — America Succeeds + CompTIA. Opens in new tab.O*NET v30.2O*NET Resource Center — Occupational Information Network, v30.2 (Sept 2025). Opens in new tab.
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Show O*NET source anchors41 anchors · skillscrosswalk.com

O*NET enrichment · skillscrosswalk.com

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Source anchors that ground each statement

Related titles
Addressing Machine Operator · Addressograph Operator · Advertising Inserter · Canceling Machine Operator · Dead Mail Checker · Direct Mail Clerk · Direct Mail Coordinator · Distribution Clerk · Envelope Sealer Operator · Express Clerk · Folding Machine Operator · Hand Inserter Operator
RAPIDS apprenticeships
—
O*NET skills
SpeakingCritical ThinkingMonitoringTime ManagementReading Comprehension
Knowledge domains
Customer and Personal ServiceEnglish Language
Abilities
Near VisionOral ComprehensionSpeech RecognitionInformation OrderingCategory FlexibilityManual DexterityFinger DexterityWritten ComprehensionOral ExpressionProblem Sensitivity
Work styles
DependabilityAttention to DetailIntegrityCautiousnessCooperationStress Tolerance
Technology
Document management softwareElectronic mail softwareAccounting softwareData base user interface and query softwareSpreadsheet softwareOffice suite softwarePresentation softwareOperating system softwareWord processing softwareMailing and shipping software
Tasks · seed anchors for statements
  1. Wrap packages or bundles by hand, or by using tying machines.
  2. Verify that items are addressed correctly, marked with the proper postage, and in suitable condition for processing.
  3. Remove containers of sorted mail or parcels and transfer them to designated areas according to established procedures.
  4. Sort and route incoming mail, and collect outgoing mail, using carts as necessary.
  5. Affix postage to packages or letters by hand, or stamp materials, using postage meters.
  6. Determine manner in which mail is to be sent, and prepare it for delivery to mailing facilities.
  7. Accept and check containers of mail or parcels from large volume mailers, couriers, and contractors.
  8. Seal or open envelopes, by hand or by using machines.
CIP education codes
01.010601.820101.820201.820301.820451.0705

Sources: O*NET v30.2 (CC BY 4.0), SkillsCrosswalk.com, LER.me®, Anthropic Economic Index, SAFI (Jadhav & Danve, 2026), WEF Skills Taxonomy 2021, Pathsmith™ Durable Skills Framework. © 2026 EBSCOed.