Ceileigh Mangalam

Ceileigh Mangalam – Editor

Manuscript evaluations for trade fiction, nonfiction, and cookbooks. Developmental editing, copyediting, and proofreading. Let's write!


I provide general editorial services ranging from developmental editing to proofreading, as well as manuscript evaluations (editorial assessments). Whether you need a last-minute grammar check on your resume or someone to develop your three-book fantasy series, I'm your editor.

I have a BA in English, and I've been a freelance editor since 2016. In 2015, I completed Humber College's Book Publishing program, and interned at Simon & Schuster Canada before becoming a freelancer. I have an in-depth understanding of North American book publishing and its markets, and each editing decision I make is based on your intentions for your project. Clarity of purpose is the most important element of my editing whether for fiction or non-fiction.


Ceileigh’s developmental edit of my non-fiction manuscript was invaluable for making what was a complex theoretical argument flow well and be appropriate for wide variety of readers. She made sure the main thread of my argument was clear and consistent throughout my book. She also provided insightful and often alternative points of view for me to consider which not enriched my argument, but also made it more engaging and relevant. For being able to see the big picture of my book and helping me to execute that vision, I highly recommend Ceileigh’s editorial services.
-Dr. Mark Hawkins, counsellor and teacher

Ceileigh has been so helpful to me, both in her review comments and her ability to brainstorm with me on character development, structure, plot, and pacing. Her approach to working with me is highly collaborative. She applies her deep knowledge of fiction writing to my manuscript, offering specific insights that have inspired me in the revision process.
​-​Jeff Lefkoff, writer

Ceileigh was an editorial assistant at Simon & Schuster when my bestselling novel Still Mine was published. She was part of an excellent and extremely skilled team who brought the book to life and helped it spend six months on the bestseller list. Ceileigh demonstrated a very sharp eye in her editorial contributions. It was wonderful to work with her!
-Amy Stuart, author, Still Mine, Still Water, and Still Here

Ceileigh’s edits were incredibly helpful for the novel I’m working on. Her knowledge of technical aspects, attention to detail, and spatial awareness in scenes was the feedback I needed to improve my draft. Her fresh perspective and insightful edits fleshed out my writing, and gave me more confidence in the overall story. Thank you so much!
​-Jenn Galambos, writer
Biographies & Memoirs Cooking, Food, Wine, & Spirits Health & Wellbeing
Fantasy Literary Fiction Science Fiction Young Adult
English (CAN) English (US)
  • Creative Book Publishing - Grad Certificate
  • Bachelor of Arts with Honours, English

Work experience


Apr, 2016 — Present

Provide developmental editing, line editing, copyediting, and proofreading services, as well as manuscript evaluation and editorial reports.

Humber Publishing Services

Sep, 2015 — Jan, 2017 (over 1 year)

Provided manuscript evaluation including light editing to first-time authors.

Simon & Schuster Canada

Sep, 2015 — Sep, 2016 (about 1 year)

Supported the editorial department of Simon & Schuster Canada, including pursuing image permissions during book development, creating and editing jacket copy and backmatter (e.g., author interviews), reading manuscripts for consistency, and participating in editorial and acquisition discussions.

Ceileigh has 8 reviews





Robyn I.

Robyn I.

Jan, 2023

I really enjoyed working with Ceileigh. She was very professional and helpful. I'd highly recommend her to anyone looking for developmental and copy editing.
Kyle G.

Kyle G.

Dec, 2022

Working with Ceileigh has been amazing! She was incredible thorough in her work and provided extremely value feedback throughout the editorial process. I'd highly recommend working with her and I am grateful for her help.
Brian D.

Brian D.

Nov, 2022

Ceileigh was really helpful. Helped with a few big things I really overlooked. I would work with her again.
Alex C.

Alex C.

Apr, 2022

Ceileigh was not only professional and has a clear understanding of story development, she is great at explaining where I needed to develop my story and improve the content. Being a first time author, I appreciate how detailed the review was and how and why I needed to make those changes. She clearly understands and can help any author, whether they are just starting or established. I highl...
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Brian D.

Brian D.

Apr, 2022

Working with Ceileigh was very worthwhile. Her critique was more detailed than expected. She gave me a lot to think about. I will gladly work with Ceileigh again.