Senior Design Engineer - Water/Wastewater Treatment

At MacKay, we believe great people are the foundation of our growth and success.

We are in an exciting phase of expansion, creating new opportunities for our employees to take on meaningful work, collaborate across disciplines, and build long-term careers. Whether your role is technical or part of our support services team, you play an important role in delivering high-quality work and helping our projects succeed.

Engineering Analytics, Inc., now part of MacKay, is seeking a dedicated and relationship-driven Senior Design Engineer to join our team. If the opportunity to make a powerful impact in the water/wastewater treatment process resonates with your goals, let's talk. We are open to reviewing candidates based remotely and are able to support our clients. Proximity to a MacKay Branch office location is preferred.

We offer a comfortable, collaborative work environment with flexible work arrangements.

This engineer will be required to travel for about 20% of their time.

Key Responsibilities:

• As a senior technical advisor for water treatment process, provide expert guidance on all aspects
• Perform and review analyses, prepare drawings, and write and review specifications
• Responsible for preparing work product
• Prepare and review scope and budgets for proposals
• Oversee construction projects as Client representative
• Build and maintain strong client relationships
• Lead, mentor, and grow the water treatment team

Minimum Qualifications:

• B.S. in Chemical, Mechanical or Civil Engineering with an emphasis to the design of water/wastewater treatment systems
• Colorado P.E. license is required; P.E. in other southwestern states is a plus
• 10+ years of experience in process design, construction and operations
• Cost estimation, scheduling, subcontractor management
• Independent project management
• Manage and mentor junior staff

Preferred Qualifications:

• M.S. in Chemical, Mechanical or Civil Engineering
• 40-hour HAZWOPER certification
• 40-hour MSHA certification
• Experience with treatment plant operations

Technical Skills and abilities:

• Engineering design, including process, mechanical, piping, and pumping systems
• Operational and oversight experience
• Construction management/oversight
• Cost estimating
• Preparation of procurement and construction specifications
• Scheduling and subcontractor management

Interpersonal skills:

• Nimble learner and adapts well to change
• Emotional intelligence
• Maintains confidentiality
• Active listening skills

Why Join MacKay?

A people-first culture
At MacKay, we put people first. We are committed to creating an environment where employees can grow, contribute, and do their best work. We support well-being, encourage balance, and create space for people to succeed both professionally and personally.

Meaningful work and real impact
Our teams take on complex infrastructure and environmental challenges that support critical systems and shape the places where people live and work. Every role contributes to delivering that work and making it successful.

Growth and opportunity
We are in an exciting phase of growth, expanding across geographies, services, and markets. That growth creates opportunities for our employees to take on new challenges, build their careers, and contribute in new ways as the company evolves.

A strong and trusted foundation
Built on more than 50 years of experience, MacKay has developed a reputation for quality work, strong relationships, and dependable results. You’ll be part of a team with a solid foundation and a clear direction for the future.

Opportunities to share in success
We provide opportunities for employees to participate in ownership and build long-term financial value as the company grows.

Our Values

At MacKay, our values guide how we work, collaborate, and support one another.

• Honesty. We build trust through transparency, integrity, and accountability.
• Dedication. We are committed to the success of our team members, clients, and communities.
• Relationships. We foster lasting connections that strengthen our work and the teams around us.

Who We Are

MacKay is an infrastructure and environmental services firm built on more than 50 years of experience and a growing collective of expertise.

We are in an exciting phase of growth, expanding our reach, strengthening our capabilities, and bringing together talented teams across the country. That growth is creating new opportunities for our employees to take on meaningful work, collaborate across disciplines, and build long-term careers.

Every role at MacKay contributes to the success of our projects and the clients we serve. Whether your work is technical or operational, you are part of a team that delivers quality, builds relationships, and moves projects forward.

We’re looking for dedicated, talented individuals who deliver excellence, thrive in collaborative environments, and value both meaningful work and work-life balance. If this sounds like you, we’d like to hear from you.

About Engineering Analytics, Inc.
Engineering Analytics, Inc. (EA), now part of MacKay, is a civil and environmental engineering firm with a strong reputation for solving complex infrastructure and remediation challenges. With offices in Fort Collins, Colorado; Raton, New Mexico; and San Diego, California, the EA team brings deep expertise in site remediation, mining, water resources, municipal infrastructure, and energy-related projects.

EA will continue to operate under its established name during a transitional period as we work toward full integration with MacKay. Our combined capabilities allow us to offer broader career opportunities, greater resources, and expanded services while maintaining EA’s client focus, collaborative culture, and technical excellence. To learn more about EA’s background and areas of expertise, visit

Please note that the salary information shown below is a general guideline only. Salaries are based upon candidate experience and qualifications, as well as various market and business considerations.

US Pay Range

$130,000—$155,000 USD

Full-time employees receive a well-rounded benefit package including access to our company-sponsored Medical (including an HSA High Deductible option), Dental, Vision, FSA, and Supplemental Life Insurance plans. We also offer 100% company-paid Life Insurance, Short-Term Disability, and Long-Term Disability coverage. Employees are eligible to participate in our company's 401(k) plan with up to a 4% match. Additionally, employees receive paid vacation and sick time, 11 paid holidays, and are able to participate in employee ownership options. MacKay pays for expenses associated with licensure as well as annual performance bonuses.

Employment requires passing a pre-employment background check and drug screen.

As a federal contractor, we participate in E-Verify and are proud to be an Equal Employment Opportunity Employer.

Open until filled.