Positions - Several
Days Off - Various
Shift - Various
This is precision metal fabrication and repair work. An employee in this job is responsible for the design and planning, layout, fabrication and repair of rapid transit vehicle components and parts. The work requires an understanding of machinist procedures and practices; mechanical, welding and metallurgical theory; precision measurement, set up and operation of metal removing machines, and the parts, tools and equipment associated with metal fabrication of WMATA rail car parts.
Employees are assigned elementary machine shop work in a repair facility to gain familiarity with and acquire skills in repair and inspection of transit vehicles. All important aspects of the work are subject to detailed and specific procedures which the employee follows closely. Employees receive instruction and close supervision on new assignments, while regular assignments are performed independently. Work is normally reviewed and verified upon completion. Employee is supervised by a Rail Car Inspection or Shop Supervisor.
MAJOR DUTIES
Performs metal fabrication, repairs, inspections, required adjustments, calibration, testing, cleaning, and scheduled maintenance on rail car equipment in accordance with blueprints, drawings, operation manuals, manufacturers, industry and/or WMATA specifications and standards.
Maintains and calibrates various precision tools and gauges and portable, fixed and diagnostic test equipment to verify accuracy and compliance to industry standards.
Dismantles assemblies and removes defective parts, inspects used parts and mechanisms for changes in clearances, alignments, and tolerances, dimensional requirements, in accordance with manufacturers, industry and/or WMATA specifications. Fabricates, fits and assembles parts and mechanisms and verifies correct clearances, alignments and tolerances using precision measuring instruments. May design or fabricate special jigs or fixtures.
Sets up and operates machine tools; fits and assembles parts; fabricates, repairs, refurbishes and refinishes defective metal parts and structures applying the knowledge of mechanics, metal properties, layout, machining procedures and shop mathematics.
Sets up and operates metal removing machines (lathe, milling machine, shaper, borer, grinder) to machine parts to specification/tolerance. Verifies conformance of workpiece to specifications/tolerances using precision measuring instruments such as micrometers, dial indicators, calibrated rulers and venier calipers.
Performs the disassembly, replacement and overhaul of rail car wheel/axle assemblies and sub assemblies; sets up and operates wheel and axle shop speciality equipment (wheel lathe, wheel bore and wheel press); verifies and performs quality control checks for wheel trueness, bore dimensions, finish, interference and heat shrink fits in accordance with manufacturers, industry and/or WMATA specifications and standards using precision measuring tools (dial indicators, calipers, veniers). Performs magnetic inspections using Magnaflux equipment to determine defects (surface cracks) in rail car axles.
Repairs, refurbishes, refinishes and fabricates parts and mechanisms on rail car body, propulsion control, fiction brake, coupler and draft gear, pneumatic and HVAC systems using various processes such as machining, honing or welding.
May develop specifications from general descriptions to draw/sketch or fabricate damaged or replacement parts; determines dimensions and tolerances of the piece to be machined; tools, materials and machines required; and sequence of operation to complete the work.
Measures, marks and scribes dimensions and reference points to lay out stock for machining. Verifies dimensions and alignments with precision measuring instruments, such as micrometers, height gauges and gauge blocks.
Positions and secures workpiece in holding devices such as vises, V blocks and angle plates, special jigs or fixtures; uses hand tools such as files, scapers
and wrenches to fit and assemble parts to components and mechanisms.
Maintains wheel and axle shop equipment, portable hydraulic equipment, gauging and calibration equipment and welding, cutting and heating equipment by performing scheduled maintenance. Cleans, lubricates, adjusts and aligns finishing equipment, lathes, mills, drill presses, saws and shears; balances, dresses and trues grinders; sharpens and shapes chisels, cutters and machine tools.
May perform flame cutting, arc or gas welding operations, brazing and soldering when required.
Lifts machined parts manually or with hoists.
Implements Engineering Modification Instructions (EMIs) and Maintenance Service Instructions (MSIs) to rail car mechanisms. Performs new component acceptance testing.
Completes required documentation and reports for the repair and maintenance of transit car equipment and related components by using the proper forms, tags or
entering data into the Maintenance and Reliability System (MARS); requisitions parts from the supply room.
Attends on the job and formal training classes; assists mechanics in higher classifications in their assignments or provides job specific training to mechanics in lower classifications.
Responds to and provides assistance in emergencies which require movement of trains involved in incidents, accidents or derailments using rerail equipment.
Performs all tasks and assignments within the established safety practices and maintenance guidelines.
May operate Authority vehicles between work locations.
Works variable shifts, days and hours as required and as provided for under existing Union contract.
Performs all other related duties as required.
KNOWLEDGE, SKILLS AND ABILITIES:
Knowledge of and demonstrated ability to perform all duties at current level.
Knowledge of assigned CMNT sections functions, procedures and guidelines and the maintenance requirements of the Authority operation supported.
Knowledge of and demonstrated ability to identify and apply basic facts and principles of the Authoritys operating, maintenance and safety rules, regulations and procedures.
Ability to select feed rates, cutting speeds, depth of cut and cutting tools for each operation using step by step procedures to perform various machinist tasks; continues to demonstrate increasing knowledge of metal properties, machining processes and shop mathematics.
Ability to machine metal work pieces in accordance with specifications, tooling instructions and standard charts applying knowledge of machining methods.
Ability to efficiently use precision measuring devices.
Ability to acquire extensive knowledge of heat treating processes to include characteristics of metals and alloys.
Demonstrated skill in welding (MIG, TIG, arc, gas), brazing and soldering techniques required. Ability to obtain certification desired.
Ability to communicate effectively orally and in writing.
Ability to accept supervision and complete duties and work assignments timely and accurately.
Ability to deal courteously and effectively with supervisors and coworkers.
Ability to identify basic facts and terms relating to machine shop operations and set ups, shop theory, characteristics of metals and alloys, bench working techniques and welding processes, and how they relate to the reconditioning, repair or fabrication of rail car parts and mechanisms.
Ability to identify and correct routine mechanical problems. Employee expected to perform simple parts of the procedure with assistance or demonstration from supervisor or mechanics in higher classifications.
Ability to identify drafting symbols and define their meanings; read and use blueprints, sketches, machine drawings, written job orders and the machinists handbook to determine correct threads, fits, tapers and tolerances, product specifications (tolerances/dimensions), tooling instructions (fixtures, feed rates, cutting speeds or depth of cut) and cutting tools to be used to recondition, repair or fabricate rail car parts or mechanisms.
Ability to perform limited set up and operation of wheel and axle shop equipment.
Qualification Requirements
To be considered for the position, you must meet minimum qualifications. It is, therefore, very important for you to include on your application any education/experience you have had that is described in the minimum qualifications. Incomplete information may delay the assessment process.
Qualifications
Graduation from high school or possession of a high school equivalency certificate, and satisfactory completion of an acceptable vocational school and/or training program in basic machine shop repairs or a related field is required. Must satisfactorily pass both a written and practical examination with a minimum score of 70 to advance to the next level.
Considerable knowledge of and have performed satisfactorily the duties of a machinist or related field for a period of not less than two (2) years.
LICENSE:
Possession of a valid District of Columbia, Maryland or Virginia motor vehicle operators license issued from jurisdiction of residence. Safe driving record with no more than four (4) points accumulated over the past three (3) years; no more than one (1) moving violation.
MEDICAL GROUP:
Ability to complete satisfactorily the medical examination for this job.
Ability to perform strenuous physical tasks including frequent lifting of objects weighing up to 50 pounds and occasionally to 75 pounds.
Ability to distinguish basic colors for safety identification.
Evaluation Criteria
Evaluation Criteria may include one or more of the following:
1. Education, training and experience
2. Personal Interview
3. Medical examination which may include alcohol and drug testing
4. Performance and attendance record
5. Background check to include criminal, credit, education, work and drivers record
Closing Statement
Posted salary ranges and employment offers are subject to union coontracts and agreements and WMATA salary administration guidelines. The Washington Metropolitan Area Transit Authority is an equal opportunity employer, and encourages applications from minorities, females and persons with disabilities.
ORDER OF PREFERENCE: The selection for Maintenance and Construction positions is made on the basis of fitness and ability with preference given to Maintenance and Construction District, System Wide (L689), Authority wide and external candidates, respectively.
Country: USA, State: Dist of Columbia, City: Washington, Company: Washington Metropolitan Area Transit Authority.
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