Mechanical Engineer

CACI International; Melbourne (KY); On-site; USD 72,000 - 150,000; Full time

Job summary

CACI International is seeking an experienced Mechanical Engineer (T3) to lead design, analysis, integration, and testing of high‑reliability mechanical systems for defense and aerospace programs.

You will drive hardware from concept through prototype, qualification, and production, collaborating with IPTs across engineering disciplines to meet MIL‑STD requirements and ensure manufacturability for LRIP to full‑rate production.

Qualifications

• ABET-accredited degree in Mechanical Engineering, Aerospace, or related field.
• 5–8+ years of relevant mechanical engineering experience in aerospace/defense/government contracting.
• Advanced proficiency in 3D CAD modeling and drawing generation (SolidWorks, Creo, Siemens NX).
• Strong foundation in structural mechanics, heat transfer, dynamics, materials, and fabrication processes.
• Proficiency with GD&T (ASME Y14.5) and familiarity with MIL-STD guidance.
• U.S. Citizenship and active Secret clearance or eligibility for Top Secret.

Responsibilities

• Lead design, analysis, integration, and testing of complex mechanical systems for defense/aerospace.
• Direct designs through SRR, PDR, and CDR.
• Create and review drawings with GD&T per ASME Y14.5.
• Formulate qualification and acceptance test plans; lead testing (vibration, thermal vacuum, shock).
• Coordinate with internal shops and external suppliers to procure parts and resolve non-conformances.
• Collaborate with IPTs to ensure LRIP to full-rate production readiness.

Skills

3D CAD modeling

Structural analysis

Thermal analysis

Systems integration

Education

ABET-accredited B.S. in Mechanical Engineering

Tools

SolidWorks

PTC Creo

Siemens NX

FEA/CFD

Job description

Job Title: Mechanical Engineer

Job Category: Engineering

Time Type: Full time

Minimum Clearance Required to Start: None

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Continental US

* * *

The Opportunity:

We are seeking an experienced Mechanical Engineer (T3) to lead the design, analysis, integration, and testing of complex mechanical systems and sub-assemblies for defense and aerospace applications. In this role, you will drive hardware from initial concept through detailed design, prototype fabrication, qualification testing, and production transition. You will collaborate closely with cross-functional Integrated Product Teams (IPTs)—including systems, electrical, thermal, structural, and manufacturing engineering to deliver high-reliability hardware meeting stringent DoD standards.

• Mechanical Design & CAD: Lead the 3D modeling, layout, and detailed drafting of mechanical components, structural enclosures, ruggedized electronics packaging, or mechanism assemblies using CAD software (SolidWorks, Creo, or Siemens NX).

• Engineering Analysis: Conduct structural, stress, thermal, dynamic, and environmental analyses (FEA/CFD) to validate mechanical designs against harsh military environments (MIL-STD-810, MIL-STD-167, etc.)

• Lifecycle Technical Leadership: Direct designs through formal technical reviews, including System Requirements Review (SRR), Preliminary Design Review (PDR), and Critical Design Review (CDR).

• Drawing & Tolerance Standards: Create and review engineering drawings incorporating Geometric Dimensioning and Tolerancing (GD&T) in accordance with ASME Y14.5 guidelines.

• Prototyping & Testing: Formulate qualification and acceptance test plans, specify test tooling/fixtures, and lead hands‑on testing (vibration, thermal vacuum, shock, environmental).

• Vendor & Supply Chain Interface: Coordinate with internal machine shops and external suppliers to procure parts, review vendor manufacturing capabilities, and resolve non‑conformances.

• Design for Manufacturability (DFM): Work closely with manufacturing engineers to ensure seamless transition from low‑rate initial production (LRIP) to full‑rate production.

Qualifications:

Required:

• Education: Bachelor of Science in Mechanical Engineering (BSME), Aerospace Engineering, or a closely related ABET‑accredited degree.

• Experience: 5 to 8+ years of relevant mechanical engineering experience in the aerospace, defense, or government contracting sectors.

• CAD Proficiency: Advanced proficiency in 3D CAD modeling and mechanical drawing generation (SolidWorks, PTC Creo, or Siemens NX).

• Technical Knowledge: Strong foundation in structural mechanics, heat transfer, dynamics, materials selection (metallics and composites), and fabrication processes (machining, sheet metal, additive manufacturing).

• Standards & Processes: Proficiency with ASME Y14.5 (GD&T) and familiarity with military standards (e.g., MIL-STD-130 MIL-STD-461, DO-160).

• Clearance Requirements: U.S. Citizenship is required. Must possess an active Secret Security Clearance, or demonstrate eligibility to obtain a Top Secret clearance.

What You Can Expect:

A culture of integrity.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high‑performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together, we will advance our nation’s most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.

Pay Range :

There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.

The proposed salary range for this position is:

$71,500 - $150,200

CACI is anEqualOpportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any otherprotectedcharacteristic.