Company lists · Data refreshed September 2026

Top 24 Energy engineering consulting firms based in Indianapolis, United States

Name: Energy engineering consulting firms based in Indianapolis, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 33 companies tracked

RevenueBase identified 33 energy engineering consulting firms headquartered in Indianapolis, United States as of September 2026 and tracks 1,080 professional contacts across them, including 473 with verified work emails. Across the United States, Houston is the largest hub for this category (298 companies); Indianapolis has 33.

This list covers energy engineering consulting firms headquartered in Indianapolis, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 24, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 24, 2026 86% judged on-target in blind review

33Companies

1,080Contacts tracked

473Verified emails

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The 24 largest energy engineering consulting firms based in Indianapolis, United States

Ranked by team size

Top 24 of 33 energy engineering consulting firms based in Indianapolis, United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to energy engineering consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Infrastructure And Energy Alternatives, Inc. IEA , A Mastec Company	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	5,001-10,000	318 contacts →
	Partial evidence “Infrastructure & Energy Alternatives (IEA), a MasTec company, was formed in 2011 and began building an integrated portfolio of energy and infrastructure construction companies.” Source: RevenueBase Database · checked Sep 24, 2026
2	Wessler Engineering	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	51-200	109 contacts →
	Partial evidence “Wessler Engineering is a civil and environmental engineering firm, specializing in wastewater, drinking water, and stormwater projects, providing services ranging from master…” Source: RevenueBase Database · checked Sep 24, 2026
3	Mussett Nicholas Associates	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	51-200	106 contacts →
	Partial evidence “From its inception and establishment in 1959, Mussett, Nicholas & Associates, Inc.(MNA) has set a standard of excellence in consulting services.” Source: RevenueBase Database · checked Sep 24, 2026
4	Envelop Group	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	201-500	86 contacts →
	Indirect evidence “Our mission is to be advocates and trusted advisors for anyone wishing to achieve environmental and economic balance throughout their facilities.” Source: RevenueBase Database · checked Sep 24, 2026
5	Applied Engineering Services	Strong evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	72 contacts →
	Strong evidence “Applied Engineering Services is an Indianapolis-based consulting engineering firm providing mechanical, electrical, and instrumentation engineering services.” Source: RevenueBase Database · checked Sep 24, 2026
6	R.E. Dimond And Associates	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	68 contacts →
	Indirect evidence “R.E.” Source: RevenueBase Database · checked Sep 24, 2026
7	Tlf, INC	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	50 contacts →
	Partial evidence “TLF is a forty person engineering firm located on the northwest side of Indianapolis, Indiana, that specializes in Project Management, Structural Engineering, Site Development…” Source: RevenueBase Database · checked Sep 24, 2026
8	Circle Design Group	Strong evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	25 contacts →
	Strong evidence “CIRCLE DESIGN GROUP is a successful MEP/civil consulting engineering firm serving our clients since 1982.” Source: RevenueBase Database · checked Sep 24, 2026
9	Lynch, Harrison & Brumleve, INC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	20 contacts →
	Indirect evidence “Founded in 1959, LYNCH, HARRISON & BRUMLEVE, INC.” Source: RevenueBase Database · checked Sep 24, 2026
10	PSG Energy Group	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	19 contacts →
	Partial evidence “PSG Energy Group (PSG) makes it easy for customers to explore and implement energy savings and sustainability measures.” Source: RevenueBase Database · checked Sep 24, 2026
11	Cmid, INC	Strong evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	18 contacts →
	Strong evidence “Consulting Management Inspection Design, Inc.(CMID) is a minority owned full service architectural & engineering consulting firm.” Source: RevenueBase Database · checked Sep 24, 2026
12	Alpha Engineering, INC	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	17 contacts →
	Partial evidence “From system planning to line and substation design to the Smart Grid, Alpha Engineering has the capabilities and expertise to meet your every power engineering need.” Source: RevenueBase Database · checked Sep 24, 2026
13	Silver Creek Engineering, INC	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	16 contacts →
	Partial evidence “Established in 1994 in Indianapolis, Silver Creek Engineering, Inc.” Source: RevenueBase Database · checked Sep 24, 2026
14	RPG Energy Group	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	15 contacts →
	Indirect evidence “Our team comes from a diverse and experienced background within the renewables and construction industry with over 48 years of combined experience.” Source: RevenueBase Database · checked Sep 24, 2026
15	Loftus Engineering, INC	Strong evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	14 contacts →
	Strong evidence “Loftus Engineering is an Indianapolis-based WBE, full service mechanical and electrical consulting engineering firm, specializing in unique, complex and sustainable building…” Source: RevenueBase Database · checked Sep 24, 2026
16	Advanced Engineering Consultants	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	1-10	12 contacts →
	Partial evidence “AECME specializes in mechanical, electrical, and plumbing engineering design services for the A/E/C industry.” Source: RevenueBase Database · checked Sep 24, 2026
17	Peine Engineering CO	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	9 contacts →
	Partial evidence “Peine Engineering has many years,(71 and still counting) of experience on industrial, medical, institutional and commercial projects.” Source: RevenueBase Database · checked Sep 24, 2026
18	NEO Engineers, LLC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	1-10	5 contacts →
	Indirect evidence “NEO Engineers has been involved with a wide variety of mechanical and electrical systems over the years.” Source: RevenueBase Database · checked Sep 24, 2026
19	Surinak Engineering	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	1-10	4 contacts →
	Partial evidence “As professional engineers, we are licensed in Indiana, Missouri, Ohio, and Pennsylvania and insured for the practice of Structural Engineering, Mechanical, Electrical and Plumbing…” Source: RevenueBase Database · checked Sep 24, 2026
20	Solar UV Solutions	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	3 contacts →
	Indirect evidence “We know you have an overwhelming number of space and water heating options.” Source: RevenueBase Database · checked Sep 24, 2026
21	Flex Green Energy	Strong evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	1-10	3 contacts →
	Strong evidence “Flex Green Energy provides services for energy consulting and distribution.” Source: RevenueBase Database · checked Sep 24, 2026
22	Impact Industrial Services	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	11-50	2 contacts →
	Partial evidence “IMPACT INDUSTRIAL SERVICES is a multi-faceted energy consultation and solution development firm that strives to create meaningful, impactful differences in your company’s bottom…” Source: RevenueBase Database · checked Sep 24, 2026
23	Energy Data Services	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	1-10	2 contacts →
	Partial evidence “Energy Data Services provides energy audits, building energy models, renewable energy studies and capital planning assistance for lenders, building owners, and facility managers…” Source: RevenueBase Database · checked Sep 24, 2026
24	JPS Consulting Engineers, LLC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 24, 2026	1-10	1 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 24, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: energy engineering consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names energy engineering consulting firms.
Partial evidence: Its own public description names part of energy engineering consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy engineering consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 24 of 33 energy engineering consulting firms based in Indianapolis, United States

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Energy engineering consulting firms based in Indianapolis, United States at a glance

As of Sep 24, 2026

43.8%Verified-email coverage

32.7Average contacts per company

11-50Median size (employees)

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

5,001-10,000

Email recency for this list is measured across the whole United States list rather than for Indianapolis, so it is reported there. Company counts and contact totals on this page are exact for Indianapolis, over 33 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among energy engineering consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Indianapolis, United States whose own description of what they do matches “energy engineering consulting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names energy engineering consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among energy engineering consulting firms, and records with no verified work email. Companies headquartered outside Indianapolis are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 473 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 24, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Energy engineering consulting firms by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names energy engineering consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many energy engineering consulting firms are there based in Indianapolis, United States?

RevenueBase identified 33 energy engineering consulting firms headquartered in Indianapolis, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Infrastructure And Energy Alternatives, Inc. IEA , A Mastec Company, headquartered in Indianapolis, tops this list with the largest team on record.

Which city in the United States has the most energy engineering consulting firms?

Houston leads the United States with 298 headquartered companies, followed by New York (190) and Austin (99). Indianapolis has 33.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 473 verified decision-maker contacts tracked across these 33 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 24, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.