Freelance designer Jobs in Indianapolis, IN

Mechanical Designer

Company: R E Dimond
Location: Downtown Indianapolis, IN
Schedule: Full-time | Monday–Friday Core Hours (Flexible Start/End)
Salary Range: $60,000 – $80,000 (DOE/level)
Total Compensation: $85,000 – $110,000+ (includes benefits, profit sharing/bonus)

About R E Dimond | Why Join Us

R E Dimond is a forward-thinking engineering firm delivering high-performance, sustainable mechanical and HVAC systems across commercial, institutional, and industrial sectors.

We believe the best work happens when talented people are empowered to stretch themselves, work collaboratively, and continue learning.

What You’ll Gain by Joining:

• Impactful projects: Be part of technically challenging, visible projects with meaningful outcomes.

• Mentorship + Growth: Learn directly from senior engineers while owning significant design tasks.

• Training & Certifications: Access LEED, ASHRAE, controls, and continuing education programs.

• Supportive Culture: Collaborative, respectful, and feedback-driven with a focus on work–life balance.

• Comprehensive Benefits: Health/dental/vision, PTO, 401(k) match, bonuses, flexible work arrangements.

We’re investing in our people and systems. If you’re ready to grow your career and contribute to smarter, more sustainable mechanical systems, this is your opportunity.

Position Overview

As a Mechanical Designer, you’ll work under the direction of a Mechanical Engineer and Project Manager to design HVAC and mechanical systems that meet high standards of performance, efficiency, and constructability.

This role blends technical design, fieldwork, and cross-discipline collaboration. As you grow, you’ll assume greater independence, lead coordination efforts, mentor junior staff, and handle larger project scopes.

Key Duties & Responsibilities

• Apply mechanical and thermodynamic principles to design and specify HVAC, plumbing, and mechanical systems.

• Perform HVAC load estimation, energy usage calculations, and energy code compliance documentation.

• Coordinate with architects, structural, electrical, and client teams to integrate all MEPT elements.

• Design systems including:

  • Ductwork layout, sizing, routing

  • Air distribution devices (grilles, diffusers, registers)

  • Central & terminal HVAC units (AHUs, FCUs, VAV boxes, etc.)

  • Hydronic piping (sizing, routing, pumps)

  • Central plant equipment (boilers, chillers, pumps, heat exchangers)

  • Control/automation systems (sequences, control strategies, integration)

• Perform field site surveys to document existing conditions, measurements, and constraints.

• Develop conceptual and construction cost estimates (materials, labor, installation).

• Model and detail in Revit/BIM—produce and maintain drawings, views, annotations, and schedules.

• Review vendor submittals, respond to RFIs, track changes, and support commissioning/as-built documentation.

• Visit construction sites to observe installations and flag deviations.

• Mentor junior designers or interns (for higher-level designers).

• Contribute to improving internal standards, templates, and workflows.

Required skills and experience

• Bachelor’s degree in Mechanical or HVAC Engineering (or related field) plus ~2 years of experience
  — OR —

• Associate degree/technical diploma with equivalent field experience.

• Solid understanding of thermodynamics, fluid flow, and heat transfer.

• Proficiency in Revit (non-negotiable).

• Familiarity with HVAC system types (VAV, DOAS, VRF, geothermal, etc.).

• Strong collaboration, communication, and problem-solving skills.

• Attention to detail and a willingness to grow into leadership of project scopes.

Compensation & Benefits

• Base Salary: $60,000 – $80,000 (dependent on experience & level).

• Total Compensation: $85,000 – $110,000+ (includes benefits, bonus/profit sharing).

• Health, dental, vision insurance packages.

• 401(k) match, PTO, paid holidays, and flexible work arrangements.

• Professional development support—training, certifications, LEED/ASHRAE education.

• Mentorship from senior engineers in a collaborative, growth-minded environment.