Mechanical Assembler I, 1st Shift (Onsite) in San Marcos

Energy Jobline ZR; San Marcos (TX); On-site; USD 22,000 - 30,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Three weeks of vacation

Generous 401(k) plan with match

Tuition reimbursement

Job summary

RTX's San Marcos facility is seeking a Mechanical Assembler I to perform mechanical and electro-mechanical assembly, tests, and inspections on aerospace-grade products. You will work in a fast-paced environment on first shift (7am-3:30pm), applying blueprints and operation sheets to build components.

The role requires a high school diploma or GED and practical experience with hand/tools in a cleanroom setting, with a readiness to lift up to 25 lbs and stand long hours.

Qualifications

• HS diploma or equivalent (e.g., GED) required.
• 1+ year of machine operation experience preferred.
• 1+ year reading/interpreting blueprints or engineering drawings.
• 1+ year experience with hand and/or power tools.

Responsibilities

• Performs quality checks and records defects.
• Reworks and repairs assembled equipment per specs.
• Precision assembly using hand tools.
• Measures with calipers, micrometers, and rulers.
• Follows blueprints and operation sheets.

Skills

Machine operation

Blueprint reading

Hand tools

Quality inspection

Education

HS diploma or GED

Tools

Measuring tools

Calipers

Micrometers

Job description

Job Description

Date Posted: 2026-07-23

Country: United States of America

Location: US-TX-SAN MARCOS-2005 2005 Technology Wy TECHNOLOGY

Position Role Type: Onsite

U.S. , U.S. Person, or Immigration Status Requirements: U.S. citizenship is required, as only U.S. are authorized to access information under this program/contract.

Security Clearance Type: None/Not Required

Security Clearance Status: Not Required

At RTX, the world largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world's most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.

Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.

The San Marcos, TX facility is looking to fill a Mechanical Assembler I Role. You will plan and perform a variety of mechanical or electro-mechanical assembly, tests, fabrications, and inspection operations on various products in standard and non-standard environments to maintain flow of work.

Working Hours: 1st shift hours (7am-3:30 pm) Monday - Friday.

What You Will Do

• Performs quality work checks, identifies product defects and records identified defects.
• Reworks and/or repairs assembled equipment and products according to engineering specification changes.
• Precision Assembly: Utilize hand tools such as drills, torque wrenches, rivet guns, grinders, orbital sanders, and pull motors, for daily assembly tasks.
• Measurement & Inspection: Employ measuring equipment, including calipers, micrometers, and standard rulers, to ensure products meet specifications.
• Blueprints & Instructions: Adherence and understanding of blueprints and operation sheets for standard work instructions in assembling products.
• Equipment Adjustment: Adjust equipment based on test results and a thorough understanding of processes and machinery.
• Testing & Recording: Conduct tests for oxygen purity and moisture content at various stages of the process, recording gauge readings and test results.
• Compliance & Safety: Adhere to PPE and cleanroom standards to prevent foreign objects and debris from contaminating products.
• Quality & Safety Standards: Perform all tasks in accordance with established quality standards and safety procedures, maintaining a clean and safe work area.
• Must be willing and able to lift up to 25 lbs and work in a standing position for up to 10 hours per day.
• Other duties as assigned.

Qualifications You Must Have

• Typically requires HS diploma (or equivalent, e.g. G.E.D. in the US) or vocational/technical education in related discipline

Qualifications We Prefer

• 1 years minimum of relevant machine operation experience highly
• 1 or more years of Experience reading and interpreting blueprints, diagrams and/or engineering drawings to assemble equipment.
• 1 or more years of Experience with general hand and/or power tools

What We Offer

• Medical, dental, and vision insurance
• Three weeks of vacation for newly hired employees
• Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option
• Tuition reimbursement program
• Student Loan Repayment Program
• Life insurance and coverage
• Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection
• Birth, adoption, parental leave benefits
• Ovia Health, fertility, and family planning
• Adoption Assistance
• Autism Benefit
• Employee Assistance Plan, including up to 10 free counseling sessions
• Healthy You Incentives, wellness rewards program
• Doctor on Demand, virtual doctor visits
• Bright Horizons, child and elder care services
• Teladoc Medical Experts, second opinion program
• And more!

Our Advanced Structures team leverages advanced materials and additive manufacturing to develop complex interior and exterior solutions. These solutions ensure structural integrity of the aircraft, help aircraft take off and land, stay trim in the air, move forward, carry cargo and conduct rescues. We delight our customers with superior products and best-in-class service. Our global team is committed to continuous improvement - we work hard to make our solutions lighter-weight, stronger and more technically advanced, so that plane travel can be safer, more affordable and more sustainable in the years to come. We are looking for the best and brightest to fly and land with us!

WE ARE REDEFINING AEROSPACE.

*Please ensure the role type (defined below) is appropriate for your needs before applying to this role.

Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products.

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.

Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term , long-term , 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement.

Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company's performance.

This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply.

RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window.

RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to , , , , , , , , or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans' Readjustment Assistance Act.