Junior Civil Engineer - Land Development​/Public Infrastructure

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Mac Kay & Somps Civil Engineers, Inc.

Mac Kay & Somps is seeking a Junior Civil Engineer to join our Roseville, CA office. Candidates must hold a B.S. in Civil Engineering or related field from an ABET-accredited university. EIT certification in California is highly desirable. Prior work in land development, drainage and flood control, or municipal water system design is helpful, but not required. This is a great opportunity for candidates interested in land development and/or public infrastructure design to gain experience working alongside a seasoned team of engineers and planners.

While we are actively interviewing Junior engineer candidates, we are anticipating the start date of this position to be around June 2027. Official start date to be confirmed with the successful candidate.

Must be authorized to work in the United States.

As a Junior Civil Engineer, you will support project teams throughout the entitlement, design and construction phases of land development and public infrastructure projects. You’ll work closely with project managers and senior staff on:

• Preparing plans, calculations, and technical reports
• Grading, drainage, water, and sewer design
• Stormwater management and modeling
• Supporting entitlement and permitting processes
• Drafting and plan production using AutoCAD Civil 3D
• Collaborating with clients, agencies, and consultants

This role offers the opportunity to build a strong technical foundation while gaining exposure to real-world project development from concept through construction. We are looking for candidates with:

• 0–3 years of civil engineering experience in land development or public infrastructure.
• Working knowledge of civil engineering principles, methods, and terminology.
• Proficiency (or strong interest) in AutoCAD Civil 3D, Microsoft Office (Word, Excel, and Outlook).
• Exposure to stormwater modeling software such as HEC-RAS, HEC-HMS, XP-Storm, or WaterCAD is a plus.
• A collaborative, team-oriented mindset and attention to detail
• EIT certification in California (preferred).
• Strong written and verbal communication skills.

Software used in this role may include AutoCAD Civil3D, Microsoft Office (Word, Excel, Outlook), HEC-RAS, HEC-HMS, XP-Storm, and WaterCAD. We value a strong work ethic, attention to detail, and team camaraderie. If you are an engineer who thrives in a collaborative, client-focused environment, we encourage you to apply. If you require a reasonable accommodation or would like to apply for this position, please contact  or .

For a complete listing of all our openings, please visit our careers webpage:

No recruiters.

$30 - $40 an hour

Few engineering firms match our track record in California. We are one of the largest and most successful privately held civil engineering firms in Nor Cal, with offices in Pleasanton (SF Bay Area) and Roseville (Sacramento Valley). Consistently listed in the top 500 design firms in the US by the ENR as we successfully integrate engineering, planning, and surveying expertise to get projects built efficiently and cost effectively.

Founded in 1953, Mac Kay & Somps helped drive growth in Northern California after World War II and we continue that same energy today. Our multi-disciplinary teams provide services from entitlements through construction.

Mac Kay & Somps is an equal opportunity employer.

Mac Kay & Somps’ goal is to maintain a satisfied and productive team of employees. The keys to reaching that goal are effective leadership, competitive wages and benefits, and close attention to personnel matters.

Mac Kay & Somps offers an excellent compensation and benefits package which includes:

• Competitive salary,
• Generous bonus structure,
• Profit sharing…