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Mott MacDonald • Orange, CA, US

Office Engineer

Salary:  $125,000 – $153,000 per annum
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Job Description

At Mott MacDonald, we trust our brilliant people to do brilliant things in engineering, management, and development services, supporting multisector project work in over 150 countries. As one of the largest employee-owned companies in the world, we pride ourselves on our ability to deliver exceptional outcomes through our network of 20,000+ talented consultants. With sustainability and innovation at the heart of all our sectors in North America, including, Buildings, Energy, Transportation, and Water.

We believe in empowering our people to excel, learn, and grow, offering diverse opportunities to contribute to career-defining work. Join us and be part of a collaborative environment where your ambitions are united with ours, and you can truly shape your story.

The Office Engineer is a key member of the construction project team, responsible for providing high-level project controls, contract administration, documentation management, and technical support to ensure successful project execution. The ideal candidate brings at least 15 years of progressive experience in project controls, change management, or the construction industry, with a strong understanding of public agency procedures, construction documentation, and contractor coordination. This role serves as the central hub for processing technical submittals, RFIs, change orders, progress documentation, financial tracking, and schedule updates to support the Project and Construction Management teams.

Key Responsibilities:

Project Controls & Change Management

  • Maintain and manage all project documentation, including RFIs, submittals, drawings, change directives, correspondence, and meeting notes.
  • Track project budgets, funding allocations, contingencies, and cost-loaded schedules.
  • Support monthly reporting, including progress summaries, earned value analysis, cost trending, cash-flow forecasting, and schedule updates.
  • Ensure compliance with agency standards, contract requirements, and audit-ready documentation practices.
  • Support the development, review, and negotiation of change orders, claims, and task order amendments.
  • Maintain detailed logs for potential change orders (PCOs), CORs, and pending contract actions.
  • Coordinate with designers, contractors, and internal stakeholders to validate scope, cost, and schedule impacts.

Contract Administration

  • Assist in administering construction contracts, special provisions, technical specifications, and addenda.
  • Track contractor deliverables, compliance documents, insurance, and submittal schedules.
  • Support the processing of contractor progress payments, time-and-materials records, and certified payrolls.
  • Ensure alignment with federal, state, and local funding requirements (e.g., FTA, FHWA, FRA, SB125, TIRCP, etc. if applicable).

Construction Support

  • Prepare and distribute daily/weekly construction documentation such as inspection reports, meeting minutes, punch lists, and schedule reviews.
  • Maintain up-to-date project drawings, As-Builts, and document control systems (e.g., SharePoint, Procore, eBuilder, Bluebeam PMWeb, or other platforms).
  • Support coordination between the contractor, designer, utility agencies, and project stakeholders.
  • Assist with constructability reviews, procurement documentation, and technical evaluations.

Communication & Coordination

  • Facilitate internal and external communication between project staff, contractors, subconsultants, and agency stakeholders.
  • Support preparation of presentations, board reports, status memos, and briefing materials.
  • Participate in construction meetings and maintain accurate meeting documentation.

Candidate Specification:

  • Bachelor’s degree in construction management, engineering, or a related field (or equivalent experience).
  • Experience supporting federally funded projects (FTA, FHWA, FRA).
  • Understanding of change-order negotiations, claims analysis, and cost-control methodologies.
  • Experience working with public agencies or large PM/CM contracts.
  • 15+ years of relevant experience in project controls, change management, construction management, engineering, or related fields.
  • Strong knowledge of construction contract administration, documentation workflows, and public-sector processes.
  • Experience with capital infrastructure projects such as transportation, rail, highways, utilities, or vertical construction.
  • Proficiency in project management software (e.g., MS Project, Primavera P6, SharePoint, Procore, Bluebeam).
  • Ability to read and interpret engineering plans, specifications, schedules, and cost estimates.
  • Excellent written and verbal communication skills.
  • Ability to work collaboratively in a fast-paced, multi-stakeholder environment.

Our teams are comprised of bright and enthusiastic people who wish to make a difference to the world that we live in. If you share that vision and don’t have all the experience outlined in this posting, we still want to hear from you!

Let’s discuss how we can help you take the next step in your career and how you can participate in an exciting new chapter for Mott MacDonald in North America.

At Mott MacDonald, we provide a comprehensive benefit package that includes 401k, medical, dental and vision insurance, short-term/long-term disability, paid holidays, PTO, parental leave and company paid life insurance.

The expected salary for this position is $125,000- $153,000

Individual pay is determined based on several factors such as work location, education, experience, and unique skills.

Equal opportunity is the law.

We seek to promote fair employment procedures and practices to ensure equal opportunities for all. We encourage individual expression in our workplace and are committed to creating an inclusive environment where everyone feels they have the opportunity to contribute.


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All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, protected veteran status, creed, marital status, sexual orientation, gender identity, citizenship status or disability status.

Hybrid working policy

At Mott MacDonald, we believe it makes business sense for you and your manager to choose how you can work most effectively to meet your client, team, and personal commitments. We offer a hybrid working policy that embraces your well-being, flexibility, and trust.

Company benefits

Open to part-time employees
Open to part time work for some roles
Enhanced maternity leave – 26 weeks full pay
Adoption leave – 26 weeks full pay
Shared parental leave – We match up to 24 weeks full pay
Enhanced paternity leave – 2 weeks
Private GP service – Private Medical care for all UK staff
Life insurance – 4 x salary
Enhanced pension match/contribution – matched up to 7%
Buddy scheme
Enhanced sick pay
Dental coverage
Compassionate leave
Health assessment
Eye Care Support – Eyecare vouchers
Life assurance
Carer’s leave – up to 5 days, two of which are paid
Pregnancy loss leave
Salary sacrifice
Buy or sell annual leave
Accrued annual leave
Religious celebration leave
Tax-free childcare
Theme park discounts
On-site yoga classes
Cycle to work scheme
Faith rooms
Annual pay rises
Annual bonus
Income protection
Employee discounts
Professional subscriptions – We pay for your primary professional annual subscription
Lunch and learns
Employee assistance programme
L&D budget
Teambuilding days
Travel loan
Returnship
Mentoring
In house training
Study support
Learning platform
Further education support

Working at Mott MacDonald

Company employees

18,000 worldwide

Gender diversity (male:female)

65:35

Currently hiring in

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Awards & Accreditations

2nd – Career Progression

2nd – Career Progression

Flexa awards 2025
3rd – Family Friendly

3rd – Family Friendly

Flexa awards 2025
Work-Life Balance

Work-Life Balance

Flexa awards 2025
Flexible

Flexible

Flexa awards 2025
Culture

Culture

Flexa awards 2025

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