Summer 2027

Cybersecurity Intern

Summer 2027

Updated on 9/3/2026

Deadline 10/10/27
Castleton Commodities International

Castleton Commodities International

501-1,000 employees

Energy trading and infrastructure asset investing

No salary listed

Stamford, CT, USA

In Person

Bachelor's, Master's

Category
Cybersecurity (2)
,
Required Skills
LLM
PowerShell
Python
Incident Response
Data Science
Git
ServiceNow
Cybersecurity
Vulnerability Analysis
JIRA

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Requirements
  • Currently pursuing a bachelor's or master's degree in Cybersecurity, Data Science, Computer Science, Information Systems, Information Technology, Engineering, or a related field.
  • Expected graduation in December 2027 or Spring 2028 is preferred, though adjacent graduation dates may be considered.
  • Demonstrate strong interest in cybersecurity, information security, technology risk, infrastructure security, application security, cloud security, or security operations, with emphasis on applied generative AI and agentic AI use in cyber-event detection, analysis, response, and process automation.
  • Have a foundational understanding of identity and access management, endpoint security, network security, cloud security, vulnerability management, phishing and social engineering, incident response, and data protection.
  • Have the ability to handle sensitive information responsibly and follow confidentiality, data-handling, and approval requirements.
  • Be able to communicate clearly with technical and non-technical colleagues and convert complex issues into concise summaries.
Responsibilities
  • Assist with alert review, evidence collection, initial triage notes, escalation summaries, and detection-quality improvement under analyst guidance.
  • Support tracking, documentation, prioritization, remediation follow-up, and reporting for security findings across endpoints, cloud, external attack surfaces, applications, and legacy or end-of-support technology.
  • Help maintain incident-response documentation, escalation references, tabletop materials, post-incident action tracking, and lessons-learned templates.
  • Contribute to documentation and analysis supporting multifactor authentication, Conditional Access, privileged identity management and just-in-time access, service-account ownership, privileged-access workflows, and access-review improvements.
  • Support policy-to-control mapping, AI tool and use-case inventory, approved-use documentation, data-handling guidance, data-loss-prevention and Microsoft Purview planning materials, and safe AI usage communications.
  • Assist with organizing findings and project materials related to secure software development life cycle, dependency control, secrets detection, container and cloud security, approved software sourcing, and developer security enablement.
  • Help collect and organize vendor and security review materials, map risk themes, and document decision-ready summaries for Cybersecurity review.
  • Assist with role-based awareness content, phishing and social-engineering education, AI-threat communications, campaign reporting, and end-user guidance.
  • Help maintain Jira and workstream hygiene, dashboards, risk summaries, key performance and risk indicator inputs, project status updates, and concise leadership-ready reporting.
Desired Qualifications
  • Familiarity with SIEM and security monitoring, Microsoft security tools including Microsoft Purview, CrowdStrike or endpoint detection and response concepts, ServiceNow or Jira, scripting, PowerShell or Python, cloud platforms, vulnerability scanners, Git or Bitbucket, container security, data-loss prevention and Purview, or AI security concepts.
  • Experience through coursework, labs, student organizations, certifications, prior internships, capture-the-flag activities, open-source projects, or independent research.
  • Exposure to operational technology, industrial control systems, or commodity and energy infrastructure risk.
Castleton Commodities International

Castleton Commodities International

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Castleton Commodities International trades energy and invests in energy infrastructure assets using deep fundamental research and data analytics. It buys and sells physical energy commodities and owns or funds infrastructure assets like storage facilities and pipelines, guided by market research to forecast supply and demand and to manage risk. It stands out by combining rigorous fundamental analysis with analytics and by blending short-term trading with long-term infrastructure ownership, unlike firms that focus on only one approach. Its goal is to provide sustainable, reliable energy while growing capital through disciplined trading and asset investments.

Company Size

501-1,000

Company Stage

Debt Financing

Total Funding

$4.2B

Headquarters

Stamford, Connecticut

Founded

2001

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Simplify Jobs

Simplify's Take

What believers are saying

  • November 18, 2025: CCI renewed $2.1 billion of credit facilities, oversubscribed above $2.5 billion.
  • CCI's February 2026 Linden VFT acquisition strengthens toll-like revenue in New York capacity markets.
  • November 2024 Germany BESS portfolio targets 2026-2028 operations, opening a major European growth lane.

What critics are saying

  • July 1, 2026: CCI agreed to sell Roseton, reducing generation scale and cash flow.
  • Linden VFT and Germany BESS returns depend on congested-market pricing and 2026-2028 build execution.
  • A sustained downturn in power spreads would crush optimization economics and pressure CCI's private-equity valuation.

What makes Castleton Commodities International unique

  • February 11, 2026: CCI bought Linden VFT, a 315 MW PJM-NYISO transmission asset.
  • CCI combines commodity trading with infrastructure ownership, enabling optimization across power, storage, and grid assets.
  • Its Germany BESS push and U.S. power assets show capital deployment beyond pure merchant trading.

Help us improve and share your feedback! Did you find this helpful?

Benefits

Health Insurance

Dental Insurance

Life Insurance

Employee Assistance & Wellness Programs

Parental Leave

Charitable Contribution Match Program

Tuition Assistance & Reimbursement

Paid Time Off

Continued Learning Opportunities

Employee Discount Program

Gym Membership

Growth & Insights and Company News

Headcount

6 month growth

2%

1 year growth

2%

2 year growth

2%
eFinancialCareers
Aug 5th, 2026
Point72 just discovered that top commodities traders can be hard to please.

Point72 just discovered that top commodities traders can be hard to please. 4 hours ago Last November, Steve Cohen, the top trader who runs hedge fund Point72, reportedly told investors that he was thinking of setting up a commodities business. Two months later, Reuters reported that Point72 was hiring Ryan Sheffler, a trader from "commodities merchant" Castleton Commodities. Sheffler was supposed to be joining Point72 as a natural gas portfolio manager and was due to arrive imminently. That's not going to happen. Today, With Intelligence is reporting that Sheffler is off to Millennium instead. We haven't confirmed this with Millennium or Scheffler, but Point72 is declining to comment. He will not be Millennium's only ex-Castleton hire: Fernando Ortiz, another natural gas trader, left Castleton for the hedge fund in March. Point72 was presumably gazumped. But Sheffler is not the only commodities trading professional to be hard to pin down. Headhunters in the sector say the best traders are increasingly fussy about where they work and that in many cases, hedge funds are not their first choice. "It's increasingly desirable to have exposure to the underlying physical product," says Ross Gregory, partner and head of commodities at Omerta Group, a Kingsley Gate company, in New York. "There's been a trend for commodities hedge fund traders who don't have physicals exposure or that edge to go back to commodity merchants or major trading houses." Ironically, Millennium doesn't have a physical operation, but it does have Anthony Dewell, a former Goldman Sachs commodities trader who joined Millennium in 2022. Dewell is one of the most respected traders in the market. Sheffler was a Goldman power trader before he joined Castleton. Point72, by comparison, has traditionally been an equities-focused fund. Although Cohen is a brilliant trader, it's conceivable that this could scare commodities professionals away. Volatility can be high in commodities and funds that won't accommodate this can be bad for careers. "There are some hedge funds that are very good at commodities, but if you join the wrong place it can go very badly for you," says another headhunter, asking to remain anonymous. "If you arrived in March and were on the wrong side of the Iran war, it would be difficult at the wrong fund." Citadel's commodities business is the best established and most profitable. As the Financial Times reported in June, Citadel owns actual natural gas drilling rigs and other elements of the commodity supply chain through Citadel Energy Marketing. Jane Street is also the quiet owner of a US physical natural gas business. Last October, hedge fund Jain Global acquired Anahau Energy, a US natural gas trading operation. Any exposure to physical trading is better than none. It's not clear why Sheffler didn't join Point72, but it's conceivable that the lack of a physicals business was on his mind. He may also have noted the swift comings and goings of traders at other less experienced commodities hedge funds like Verition and Brevan Howard. Peter Henry, a New York-based commodities headhunter at HW Anderson, says hedge funds themselves are also becoming more discerning when they recruit. "Hedge funds are trying to get a feel for trading style, the risk of that particular trader's book and what it does to the broader portfolio before they bring them on board," says Anderson. They will often do this using a rubric says Henry. These are time consuming hypotheticals in which traders provide examples of high conviction, high risk-on positions along with lower conviction low risk positions. "Not every fund does it, but rubrics are becoming popular in commodities," he says. Assembling a rubric is time consuming. Henry says traders see it as mitigating their risk of being stopped out when they join new funds. It's not clear whether Sheffler assembled one for Point72. Follow me on X. Follow me on LinkedIn. Have a confidential story, tip, or comment you'd like to share? Contact: +44 7537 182250 (SMS, Whatsapp or voicemail). Telegram: @SarahButcher. Signal: sarahbutcher.22 Click here to fill in our anonymous form, or email [email protected]. Bear with us if you leave a comment at the bottom of this article: comments are moderated intermittently by human beings. Sometimes these humans might be asleep, or away from their desks, so it may take a while for your comment to appear. You must take sole responsibility for comments you post on this site. We will take reasonable steps to weed out anything that we consider to be offensive or inappropriate. The essential daily roundup of news and analysis read by everyone from senior bankers and traders to new recruits. Boost your career. Find thousands of job opportunities by signing up to eFinancialCareers today. Top Articles

eFinancialCareers
Jul 27th, 2026
Some senior people slipped away from Brevan Howard's commodities business.

Some senior people slipped away from Brevan Howard's commodities business. 2 minutes ago If you are a hedge fund with a successful commodities trading business, you can make a lot of money. Witness Citadel. Witness all the other hedge funds getting in on it. Brevan Howard cut its teeth as a macro hedge fund, but is now a multistrategy hedge fund, and it trades commodities like many others. However (and also like many others), some of Brevan's commodities people have not stuck around. Several senior people have left Brevan's commodities business. Some left last year but have not previously been reported. Others left at the end of Q1. The exits are understood to include Elycia Sherman, Brevan's former head of commodities who joined from Hartree Partners in November 2023. Sherman, who declined to comment for this article, is thought to have left last year. More recently, Kobi Platt, the head of commodities strategy, went to Bridgewater. Robert Alpen, a natural gas trader in Switzerland, retraced his steps to commodities trading firm Englehart. And Jeff Nietschmann, a portfolio manager in Austin, Texas who joined from Millennium, left for Castleton Commodities. All three coincidentally left in March 2026. When Sherman arrived in late 2023, Bloomberg reported that she would be building a new team with a likely allocation of $750m. Brevan Howard didn't comment at the time, but Bloomberg noted that Brevan's previous foray into commodities trading ended with losses in 2014. Platt, Alpen and Nietschmann all arrived on Sherman's watch. Sherman joined in November 2023. Platt and Alpen joined in May 2024. Nietschmann joined in November 2024. Brevan Howard declined to comment. The fund is still trading commodities. Maybe it needs some more commodities portfolio managers? Follow me on X. Follow me on LinkedIn. Have a confidential story, tip, or comment you'd like to share? Contact: +44 7537 182250 (SMS, Whatsapp or voicemail). Telegram: @SarahButcher. Signal: sarahbutcher.22 Click here to fill in our anonymous form, or email [email protected]. Bear with us if you leave a comment at the bottom of this article: comments are moderated intermittently by human beings. Sometimes these humans might be asleep, or away from their desks, so it may take a while for your comment to appear. You must take sole responsibility for comments you post on this site. We will take reasonable steps to weed out anything that we consider to be offensive or inappropriate. The essential daily roundup of news and analysis read by everyone from senior bankers and traders to new recruits. Boost your career. Find thousands of job opportunities by signing up to eFinancialCareers today. Top Articles

Qube Mark
May 13th, 2026
Castleton Commodities International LLC Completes Renewal of Credit Facilities Totaling Over $2.1 Billion

STAMFORD Conn Nov 18 2025 Castleton Commodities International LLC CCI has announced the successful renewal of two credit facilities totaling

TradingKey
Mar 31st, 2025
Japan's Tokyo Gas expands in US shale gas with Chevron deal

T and Castleton Commodities International, has bought a 70% stake in east Texas gas assets from Chevron for $525 million, the company said on Tuesday, as it expands its U.S. gas business.

PR Newswire
Dec 3rd, 2024
Castleton Commodities International Llc Closes Credit Facilities Totaling $2.1 Billion

STAMFORD, Conn., Dec. 3, 2024 /PRNewswire/ -- Castleton Commodities International LLC (CCI) has announced the renewal of two credit facilities totaling $2.1 billion. The facilities include a $1.9 billion secured borrowing base facility, divided into an $800 million one-year tranche and a $1.1 billion two-year tranche. The secured facility also features a $1 billion accordion option to enhance CCI's liquidity and support future growth. In addition, there is a $200 million one-year committed unsecured revolving credit facility. Consistent with last year, the bank group includes 16 banks from nine different countries