Machinist (Welder)

Job summary

Click on "Learn more about this agency" button below to view Eligibilities being considered and other IMPORTANT information. The primary purpose of this position is to manufacture complex and non-routine parts and items of equipment from raw stock of different metals and metal alloys through the use of conventional and/or computer numerical control (CNC) machine tools involving unusual trade problems and requiring a high degree of ingenuity and responsibility.

Major duties

Sets up and operates a variety of conventional and/or computer numerical control (CNC) machine tools and performs precision handwork. Uses a variety of welding and cutting processes such as oxyacetylene, plasma, electrode arc, shielded metal arc welding, gas metal arc welding, gas tungsten arc welding to join all types of common metals and alloys. Manufactures complex and non-routine parts and items of equipment from raw stock of different metals, metal alloys, and other materials through the use of conventional and/or computer numerical control (CNC)machine tools, and precision handwork. Uses a variety of precision measuring instruments and equipment such as vernier calipers; height gauges; squares; protractors; inside, outside, and depth micrometers, surface gauges, vee blocks, parallel bars, gauge blocks, dial indicators; optical and mechanical comparators; and go and no-go thread, ring, bore, and plug gauge to attain dimensions and maintain tolerances. Utilizes safety practices and procedures following established safety rules and regulations and maintains asafe and clean work environment.

Qualification

In order to qualify, you must meet the quality level of experience requirements described in the Office of Personnel Management (OPM) Qualification Standards Handbook X-118C. QUALIFICATIONS: Applicants will be rated in accordance with the OPM Qualification Standard Handbook X-118C for the WG-3400 Machine Tool Work Family. Although a specific length of time and experience is not required for most blue-collar positions, you must meet any screen-out element listed and show through experience and training that you possess the quality level of knowledge and skill necessary to perform the duties of the position at the level for which you are applying. Qualification requirements emphasis is on the quality of experience, not necessarily the length of time. The screen out element for this position is the ability to do the work of a MACHINIST (WELDER) without more than normal supervision. JOB ELEMENTS: Your qualifications will be evaluated on the basis of your level of knowledge, skills, abilities and/or competencies in the following areas: 1. Knowledge of a variety of conventional and computer numerical control (CNC) machine tools such as lathes, vertical, and horizontal boring mills; bench, plain, and universal milling machines; shapers; planers; internal and external grinders, thread cutters, and radial drills; and a variety of machine tool attachments such as rotary vises, magnetic chucks, vertical milling heads, angular drive heads, taper attachments, rotary tables, and others. 2. Knowledge of various metals and other materials such as aluminum, brass, bronze, high carbon and alloy steels, chrome, nickel, titanium, nylon, rubber, plastics and Teflon's, and of the effect and relationship of heat treating, annealing, plating, welding and other related work processes on machining operations in completing an assignment. 3. Knowledge of advanced shop mathematics including plane geometry, the use of trigonometric functions and machinist handbook formulas used in laying out work and setting up machine tools, and of blueprints and their interpretation, program readouts and technical directives, the use of shop mathematics, and shop floor programming. 4. Knowledge of a wide range of welding principles, processes, and difficult techniques; and of welding standards and how various metals and metal alloys react to different welding processes and techniques used on parts and items on vehicles and all related support equipment. Number: 9M-R22286 5. Knowledge of safety regulations, practices, and procedures and skill in using and maintaining hand tools, power tools, and special jigs and fixtures. Skill in using conventional machine tools and their attachments to perform machining processes requiring special adaptation of the equipment or for manufacturing, modifying, and repairing tools, parts, and complete items of equipment for vehicles and all related support equipment, using equipment and processes for which they were not specifically designed; and in using special or improvised tools, fixtures, and setups to machine surfaces configurations such as curved surfaces requiring machine feeds in different planes simultaneously, surfaces having closely interrelated dimensions, or surfaces having unusual or compound angular relationships. 6. Skill in operating CNC machine tools through one complete cycle to manufacture the first part, proof dimensions, check sufficiency of programming, tooling, fixturing, and machine operations, edit programs and make the normal changes required; and recommend changes to programs on deficiencies noted; and in the use of precision measuring instruments and equipment such as vernier calipers; height gauges; squares; protractors; inside, outside, and depth micrometers; surface gauges; vee blocks; parallel bars; internal and external micrometers, vernier height and depth gauges, indicators, scales, and various standard and preset snap, plug, or ring gauges. Ability to weld dissimilar metals including parts and structures that vary in size, shape, and thickness. PHYSICAL EFFORT: The work requires standing, stooping, kneeling, climbing, bending, and reaching. Often required to work in hard-to-reach areas on vehicles and equipment. Frequently handles, lifts, and carries objects weighing up to 50 pounds, and occasionally lifts and moves heavier items with assistance. WORKING CONDITIONS: Machining work is performed primarily inside in areas that are usually noisy and dirty, and where there is constant danger to the skin and eyes from flying metal chips and abrasive particles; skin irritation from contact with coolants, lubricants, and abrasive compounds; and danger to fingers, hands, and other body parts from cutting tools, grinding wheels, rotating pieces, and moving parts of machines. Welding work is performed primary inside in areas that arenoisy, dirty, and smoky. There is exposure to fumes, heat, flying sparks, the glare of torches, ultraviolet radiation,and hot materials. There is the possibility of eye injury, electrical shock, burns, broken bones, and the chance ofinjury when working with sharp objects. There is discomfort when wearing protective clothing, gloves, shoes, flashshield or eye goggles and other equipment as required. Both duties will require outside work, sometimes in badweather. Both duties also require working at heights over four feet when working on top of vehicles and equipment. PART-TIME OR UNPAID EXPERIENCE: Credit will be given for appropriate unpaid and or part-time work. You must clearly identify the duties and responsibilities in each position held and the total number of hours per week. VOLUNTEER WORK EXPERIENCE: Refers to paid and unpaid experience, including volunteer work done through National Service Programs (i.e., Peace Corps, AmeriCorps) and other organizations (e.g., professional; philanthropic; religious; spiritual; community; student and social). Volunteer work helps build critical competencies, knowledge and skills that can provide valuable training and experience that translates directly to paid employment.You will receive credit for all qualifying experience, including volunteer experience.

Evaluations

Your application package (resume, supporting documents, and responses to the questionnaire) will be used to determine your eligibility, qualifications, and quality ranking for this position. Please follow all instructions carefully. Errors or omissions may affect your rating or consideration for employment. BASIS OF RATING: Your application will be rated under the Cut Point procedures based on the extent to which the quality, depth, and complexity of your experience relates to the qualification requirements. Additional points are not added for Veteran's Preference; however, Veteran's Preference is considered where applicable. Best Qualified Group: Candidates in this category possess exceptional skills and experience to exceed well above the minimum requirements. Fully Qualified Group: Candidates in this category possess good skills and experience above the minimum requirements. Basically Qualified Group: Candidates in this category meet the minimum experience requirements. The resume/documents you submit must support your responses to the online questionnaire. If your application contradicts or does not support your questionnaire responses, you will receive a rating of "not qualified" or "insufficient information" and you will not receive further consideration for this job. Applicants who disqualify themselves will not be evaluated further. APPRAISALS/AWARDS: Hiring Managers use objective methods and consider previous performance appraisals and awards in the selection process. Current Federal Civilian employees should list any relevant performance related rating and/or awards in your resume.