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1st Assistant Engineer Salary in Missouri

How much does a 1st Assistant Engineer make in Missouri? As of October 01, 2026, the average salary for a 1st Assistant Engineer in Missouri is $71,241 per year, which breaks down to an hourly rate of $34.

However, a 1st Assistant Engineer's salary can vary significantly. Here's a look at the typical salary range:

  • Top Earners (90th percentile): $82,314
  • Majority Range (25th-75th percentile): $66,418 to $77,037
  • Entry-Level (10th percentile): $62,027
Salary Factors Salary by Experience Related Job Salaries Top Paying Cities Explore Related Jobs

Check out 1st Assistant Engineer Job Openings in Missouri

Key Factors That Influence 1st Assistant Engineer Salaries

A 1st Assistant Engineer's salary isn't a fixed number. It's shaped by several important factors. Below, we'll explore how your years of experience, geographic location and company size can directly affect your earning potential.

How Experience Level Affects 1st Assistant Engineer Salaries?

Experience is a primary driver of a 1st Assistant Engineer's salary. As you build your skills and take on more complex tasks, your compensation generally increases. Here's how the average salary grows at different career stages:

  • Entry-Level (less than 1 year): $70,034
  • Early Career (1-2 years): $85,260
  • Mid-Level (2-4 years): $103,684
  • Senior-Level (5-8 years): $117,064
  • Expert (over 8 years): $139,801
Job RoleYears of ExperienceAverage Salary
1st Assistant Engineer less than 1 year $70,034
Civil Engineer II 1-2 years $85,260
Civil Engineer III 2-4 years $103,684
Civil Engineer IV 5-8 years $117,064
Civil Engineer V over 8 years $139,801

How Do 1st Assistant Engineer Salaries Vary from State to State?

Your salary can change significantly depending on where you work. States with a higher cost of living and strong industrial sectors often pay more to attract 1st Assistant Engineers. For example, consider the average annual salaries in these key locations:

  • District of Columbia: $83,021.
  • California: $82,706.
  • Massachusetts: $81,604.

Top Paying Cities for 1st Assistant Engineer

Salaries can also vary between different cities. Major metropolitan areas or cities with a high demand for technicians often offer more competitive pay. Here are a few examples of average annual salaries in different U.S. cities:

  • Braggadocio: $69,032
  • Eugene: $69,314
  • Fortuna: $69,295

1st Assistant Engineer Salary by Industry: Top Paying Sectors

For 1st Assistant Engineer roles, the industry you choose can affect earning potential by as much as 60% (the gap between the highest and lowest paying industries). Data shows that the Energy & Utilities and Insurance sectors offer the strongest compensation, at 30% above the average. In contrast, 1st Assistant Engineer positions in Transportation or Retail & Wholesale typically offer lower base pay, as these industries often view 1st Assistant Engineer as a support function rather than a direct revenue driver.

The top paying industries for a 1st Assistant Engineer

Industry Sector Average Annual Salary Average Hourly Rate Pay vs.Avg
Energy & Utilities $92,614 $45.0 30%
Insurance $89,052 $43.0 25%
Biotechnology $85,490 $41.0 20%
Pharmaceuticals $85,490 $41.0 20%
Software & Networking $81,928 $39.0 15%

1st Assistant Engineer Salary: Hourly Rate, Weekly Pay, and Monthly Pay

Understanding how a 1st Assistant Engineer's annual salary breaks down can help with budgeting. Below, you can see the average hourly rate, weekly pay, and monthly pay for this role. Use the buttons to switch between different pay periods.

  • Yearly
  • Monthly
  • Weekly
  • Hourly
  • Table View
Last Updated on October 01, 2026
$66,418
Average $71,241/year
$77,037
$5,535
Average $5,937/month
$6,420
$1,277
Average $1,370/week
$1,481
$32
Average $34/hour
$37
Annual Salary Monthly Pay Weekly Pay Hourly Wage
75th Percentile $77,037 $6,420 $1,481 $37
Average $71,241 $5,937 $1,370 $34
25th Percentile $66,418 $5,535 $1,277 $32

Find Your Next 1st Assistant Engineer Job

Ready to take the next step in your career? Browse thousands of current 1st Assistant Engineer job openings on our job board. Use the search bar below to find your perfect match.

  • Synerfac Technical Staffing | DUBLIN, GA

    Assistant Civil Engineer

    Synerfac Technical Staffing | DUBLIN, GA

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    6 Days Ago

  • Southwest Research Institute | SAN ANTONIO, TX

    STUDENT ASSISTANT

    Southwest Research Institute | SAN ANTONIO, TX

    Who We Are. We solve complex fluids problems to help society gain access to energy and water. Mutual respect and collaboration define our culture, where th... more

    6 Days Ago

  • Southwest Research Institute | SAN ANTONIO, TX

    ENGINEER

    Southwest Research Institute | SAN ANTONIO, TX

    Who We Are. The Mechanical Systems Section within the Strategic Aerospace Department provides specialized electromechanical engineering support for U.S. Ai... more

    6 Days Ago

  • Southwest Research Institute | SAN ANTONIO, TX

    LEAD ENGINEER

    Southwest Research Institute | SAN ANTONIO, TX

    Who We Are. The Tactical Aerospace Department is a premier supplier for aerospace quality Complex Electronics on new and legacy DoW systems. This includes ... more

    6 Days Ago

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Where Does Our Salary Data Come From?

Salary.com salary estimates, histograms, trends, and comparisons are derived from both employer job postings and third-party data sources. We also provide multiple percentiles of salary information for your reference, click here to know Why the Salary Midpoint Formula Is Crucial to Getting Pay Equity Right. With more online, real-time compensation data than any other website, Salary.com helps you determine your exact pay target.

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