Martha Carnes

Martha Carnes

Director/Board Member at MATRIX SERVICE COMPANY

Net worth: 2 M $ as of 2026-07-30

65 year
Commercial Services
Industrial Services
Energy Minerals

Profile

Ms. Martha Z.
Carnes
, CPA, is an Independent Director at SunCoke Energy, Inc., an Independent Director at Matrix Service Co., a Lead Independent Director at Core Laboratories, Inc., a Member at Texas Society of Certified Public Accountants and a Member at The American Institute of Certified Public Accountants.
She is on the Board of Directors at SunCoke Energy, Inc., Barbara Bush Houston Literacy Foundation, Matrix Service Co., Core Laboratories, Inc., Texas Children's Hospital and Ohio Valley Midstream LLC.
Ms. Carnes was previously employed as an Independent Director by Suncoke Energy Partners GP LLC, an Independent Director by SunCoke Energy Partners LP, a Member-Supervisory Board by Core Laboratories NV, a Managing Partner-Houston by PricewaterhouseCoopers LLP (Texas), and a Chairman-Governing Board by Greater Houston Community Foundation.
She received her undergraduate degree from The University of Texas at Austin.

Known holdings in public companies

CompanyDateNumber of sharesValuationValuation date
2025-11-03 71,183 ( 0.25% ) 825 723 $ 2026-07-30
2026-03-31 54,397 ( 0.12% ) 578 784 $ 2026-07-30
2026-05-13 55,956 ( 0.07% ) 474 507 $ 2026-07-30

Martha Carnes active positions

CompaniesPositionStart
MATRIX SERVICE COMPANY Director/Board Member 2017-07-17
SUNCOKE ENERGY, INC. Director/Board Member 2019-12-04
CORE LABORATORIES INC. Director/Board Member 2016-05-31
Director/Board Member 2015-12-31
Corporate Officer/Principal -
Corporate Officer/Principal -
Director/Board Member -
Director/Board Member 2018-08-31

Former positions of Martha Carnes

CompaniesPositionEnd
Director/Board Member 2019-05-31
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See the detail of Martha Carnes's experience

Training of Martha Carnes

Experiences
Positions held

Active

Inactive

Listed companies

Private companies

Connections

48

1st degree connections

14

1st degree companies

Male

Female

Members of the board

Executives

Linked companies

Private companies14

Industrial Services

Industrial Services

Energy Minerals

Commercial Services

Consumer Services

Health Services

Commercial Services

Non-Energy Minerals

Non-Energy Minerals

Energy Minerals

Commercial Services

Utilities