Monica Jacinto Reza

Co-inventor of Mondaloy, the superalloy enabling America's replacement for Russian rocket engines. Former Technical Fellow at Aerojet Rocketdyne, later at JPL NASA. Vanished from a ridgeline in the Angeles National Forest on June 22, 2025. Body never recovered. FLIR-negative. Scent trail terminated at a misplaced beanie. Find a Grave memorial created four days later while helicopters were still searching.

Field	Details
Full Name	Monica Jacinto Reza
Born	December 30, 1964, Los Angeles, California
Status	MISSING — presumed dead since June 22, 2025
Last Seen	Ridgeline near Mount Waterman, Angeles National Forest, Los Angeles County, California
Cause of Death	Unknown — body never recovered
Official Ruling	Missing person (LASD Homicide Bureau Missing Persons Unit)
Category	Energy Inventor / Aerospace Engineer / Missing Person

Assessment: HIGHLY SUSPICIOUS

Monica Jacinto Reza was one of the most important materials scientists in American aerospace — the co-inventor of Mondaloy, the family of nickel-based superalloys now built into the AR1 engine replacing Russian-made RD-180 rockets for U.S. national security launches. She held U.S. Patent 2010/0266442 A1. She spent decades as a Technical Fellow at Aerojet Rocketdyne (the highest technical rank in the company) and was an Associate Fellow of the American Institute of Aeronautics and Astronautics. At some point after 2023, she moved to NASA's Jet Propulsion Laboratory. She vanished from a well-maintained ridgeline in clear weather, 30 feet behind a hiking companion, in under 10 minutes. FLIR thermal imaging found nothing. Scent dogs hit a dead end. Hundreds of searchers over months found nothing. A Find a Grave memorial was created four days later — while helicopters were still in the air — listing her death date as June 22 and burial type as "green burial." No body has ever been recovered. Her disappearance connects directly to Major General William Neil McCasland, who commanded the laboratory that funded her alloy's development, and to Dallis Hardwick, her mentor and co-inventor who died in 2014.

The Strategic Importance of Mondaloy

American rocket designers had a fundamental problem for decades. The Soviets could build oxygen-rich staged combustion engines. The U.S. could not — because no American metal could survive the environment inside a rocket preburner: high-pressure gaseous oxygen, superheated, slamming through components at forces that would vaporize ordinary steel. Every alloy was a tradeoff that failed.

In the mid-1990s, at the Rockwell Science Center in California, metallurgist Dallis Hardwick and her research assistant Monica Jacinto cracked it. They found a nickel-based composition that could sit in that environment without igniting and without cracking. No coatings. No liners. Bare metal touching gas oxygen at extreme temperature.

They called the alloy Mondaloy — a portmanteau where the "Mon" belongs to Monica.

In 1999, the Air Force Research Laboratory started funding the work. NASA followed. The lab-scale alloy became two production variants: Mondaloy 100 and Mondaloy 200. Different chemistries for different heat and pressure ranges. It could be cast, forged, and 3D-printed. Twenty years of materials qualification, component testing, and integration work followed. Monica Jacinto led all of it.

The patent is public record: US 2010/0266442 A1 — "Burn-Resistant and High Tensile Strength Metal Alloys." Jacinto et al.

Why This Alloy Matters to National Security

Every time the United States launched a spy satellite, GPS satellite, or military communications satellite for the better part of two decades, it did so on a Russian engine — the RD-180, built in Moscow, sold to America because America could not build its own. Congress held hearings about it. The Air Force called it an unacceptable national security vulnerability.

Mondaloy was the fix. The AR1 engine — Aerojet Rocketdyne's replacement for the RD-180 — has twelve components made of Mondaloy: preburners, turbine rotors, turbine housings, ducts, lines, and hot gas manifolds. Every part that touches the fire.

In March 2022, Russia cut off RD-180 servicing in retaliation for Ukraine sanctions. The alloy Monica Reza invented is what stands between the United States and a gap in its ability to put national security assets into orbit.

Background

Education and Career

• B.A. and B.S. in Metallurgical Engineering — Columbia University
• M.S. in Materials Science — UCLA
• Joined Rocketdyne in 1988
• Technical Fellow for Materials and Processes Engineering — Aerojet Rocketdyne (highest technical rank in the company)
• Associate Fellow — American Institute of Aeronautics and Astronautics (AIAA)
• 2004 HENAAC Luminary Award — recognized for contributions to the Hispanic technical community and inspiring youth to pursue engineering careers (while at Boeing/Rocketdyne)
• 30+ years leading R&D teams in advanced materials and processes
• Documented on Cal State LA LAunchPad 2021 page and Dean's Advisory Board (2024–2025)

Move to JPL

Until 2023, every public record listed Monica Jacinto as at Aerojet Rocketdyne. In July 2023, L3Harris acquired Aerojet Rocketdyne for $4.7 billion. Then, on the 2024–2025 Cal State LA Dean's Advisory Board, a different listing appeared: "Monica Reza. JPL NASA." She had moved from the defense contractor that builds the engines to NASA's Jet Propulsion Laboratory — under her family name rather than the professional name attached to her patents and publications. No public announcement. No press release.

JPL is a federally funded research and development center managed by Caltech for NASA, located in La Cañada Flintridge — in the same community whose sheriff's station led the search for Monica Reza.

The Mondaloy Triangle

Reza's work connects her directly to two other people on this list:

• Dallis Hardwick — Her mentor and co-inventor. After Rockwell, Hardwick moved to AFRL's Materials Directorate at Wright-Patterson AFB. By 2005 she was leading all materials research for advanced gas turbine engines. Hardwick's team at AFRL qualified the alloy; Reza's team at Aerojet Rocketdyne produced it. Two women who invented the alloy together at Rockwell were now running both ends of the pipeline. Hardwick died January 5, 2014, of stage four breast cancer. No obituary has ever been found.

• Major General William Neil McCasland — Took command of the entire Air Force Research Laboratory in May 2011. His $4.4 billion portfolio directly funded the Mondaloy programs (AR1, Hydrocarbon Boost). When he took command, Hardwick was still one of his senior civilian scientists. Reza's contracts were still active. All three were on the same program at the same time. McCasland vanished from his Albuquerque home on February 27, 2026.

The metallurgist who understood the crystallography. The engineer who scaled it for production. The general who greenlit the programs it went into. Every person who held the complete picture of how Mondaloy moved from a lab bench to the inside of an American rocket engine is now dead or missing.

Circumstances of Disappearance

The Hike — June 22, 2025

Three hikers departed the 6000 Foot Day Use parking area on Angeles Crest Highway at approximately 9:10 a.m. Coordinates: 34.349583, -117.962806. Pacific Crest Trail crossing at Highway 2. Ridgeline terrain, 7,000 to 8,000 feet. Clear weather.

Key details:

• Her car was at someone else's house — she was dependent on the group for transport
• One of the three ("Subject C") stayed at the bottom of the steep section
• Reza and the lead hiker ("Subject A") continued to the summit of Mount Waterman and began descending the west ridge
• Independent investigators reconstructed the timeline using photo metadata: the pair covered a mile from the summit in 17 minutes (~3.5 mph — a jog) on descending terrain with a 60-year-old woman who was 4'11" and 101 pounds
• At a northerly right turn on the ridge, Subject A claims he communicated the turn to Reza
• He says she was 30 feet behind him. He initially reported 30 yards, then corrected to 30 feet. Photos from moments earlier showed 60 feet of separation
• Reza acknowledged the signal with a wave — the last confirmed contact anyone had with her
• Subject A descended approximately 150 feet before realizing she was not behind him
• He returned to the ridgeline in 8–10 minutes. She was gone
• Subject C, over 1,600 feet away and 500 feet below the ridge, could hear Subject A's shouts. Monica could not

The Search

Acting Captain Ryan A. Vienna of the LA County Sheriff's Crescenta Valley Station called it "an extraordinary search":

• Montrose Search and Rescue led, joined by units from Altadena, Antelope Valley, Malibu, San Dimas, Sierra Madre, San Diego, Ventura County, Orange County, San Bernardino County, Riverside
• LASD Air Rescue 5 ran FLIR thermal imaging sweeps the first morning — it detected a bear and other searchers, but not Reza
• An algorithmic pixel-matching program was calibrated to the red of her hiking shirt — it flagged Mylar balloons every time
• Canine units deployed
• CalTopo mapping to prevent search overlap across a 40–50 mile radius
• Vienna described "forensic technology, photography, airships (drones), canines, and other specialized tools" with "nearly no available resource untapped"
• Unnamed "federal partners" provided "continued assistance"

Physical Evidence

One item recovered: A beanie belonging to Reza was found the morning of June 23 in a steep ravine south of the ridge, descending toward Devil's Canyon. Scent dogs tracked Reza's trail from the upper ridge downward to the beanie. Then they lost the scent entirely. No exit trail. No trail in any direction. Reza's scent simply stopped at the beanie and went nowhere.

An independent investigator who visited the site: "Without significant wind, to me this meant the beanie got transported there by some walking animal (not a flying bird) or someone other than Monica."

The day she went missing, someone reported hearing "a woman screaming" in the general vicinity. The original witness was never publicly identified. Time and exact location never disclosed.

A lip balm was later found far from both the last known position and the beanie. Subject A insisted it was hers. The photo showed it weathered. Forum investigators noted it was a common brand that could have belonged to any searcher.

Subject A's Behavior

Subject A is described as a "yogi" who operates a wellness business including outdoor excursions. Reza was his client, not merely a hiking friend.

Post-disappearance contradictions:

• Directional contradiction: He explicitly told Reza to make a northerly right turn. He claims she acknowledged with a wave. Yet when SAR arrived, he was reportedly "irritated" that teams searched north and insisted she must have traveled south
• Distance inconsistency: Initially reported 30 yards, corrected to 30 feet, but photographs show 60 feet of separation
• Information control: Civilian search organizers connected to Subject A drew intense criticism. EISPIRATEN user RH wrote: "Organizers would not share previous search routes and became very guarded with information... The organizers seemed more interested in controlling all aspects of the search and online discussions to protect the other hikers who were with her rather than actually doing what's best to find her remains"
• Embedded in search: Subject A remained "very adamant about searching every bush and rock" for months, reportedly operating a YouTube account that aggressively responded to anyone suggesting foul play
• A 4-minute video posted by the organizers has since disappeared from the internet

The Find a Grave Memorial

On June 26, 2025 — four days after she disappeared and three days before the official search was even suspended — someone created a memorial page for her on Find a Grave:

• Memorial ID 284387277
• Born December 30, 1964. Died June 22, 2025.
• Death location: Angeles National Forest, Los Angeles County, California
• Remains: Green burial
• Created by contributor "lillian" (profile no longer publicly accessible)

A green burial means no embalming, biodegradable container, straight into the earth. You need a body for that. No public reports indicate her remains were recovered. No obituary. No death certificate in public databases. No funeral announcement.

Someone declared Monica Jacinto Reza dead and buried four days into the search, while helicopters were still in the air.

Institutional Silence

• JPL issued no public statement about her disappearance
• NASA issued no public statement
• Aerojet Rocketdyne / L3Harris issued no public statement
• The AIAA issued no acknowledgment
• SpaceNews, which published a feature profile of her in December 2017, did not cover her disappearance
• Aviation Week and Defense News said nothing

The only signal from inside the system: a Reddit comment on r/socalhiking — "Any updates on the search? I'm a JPLer and something is not right about this story. She needs to be found."

Why This Disappearance Is Highly Suspicious

• Strategic national security asset: Reza co-invented the alloy that enables American independence from Russian rocket engines. Twelve components in the AR1 engine are Mondaloy
• Complete chain of custody broken: Hardwick (dead 2014), Reza (missing 2025), McCasland (missing 2026) — every person who held the complete institutional memory of how Mondaloy went from lab to flight-qualified engine component has been removed from the system
• FLIR-negative: Thermal imaging could not find a 60-year-old woman in a red shirt on an open ridgeline
• Scent trail terminated: Dogs tracked her to a beanie in a ravine, then the scent simply stopped. No exit trail in any direction
• Directional contradictions: Subject A told her to go north, then insisted SAR search south
• Premature death declaration: Find a Grave memorial with death date and "green burial" created while search was active
• No body, no remains, no evidence: Hundreds of searchers over months found nothing. Terrain was steep but "not steep enough to be fatal if someone fell"
• Total institutional silence: JPL, NASA, AIAA, and every defense contractor she worked for said nothing
• Parallel disappearance: Melissa Casias vanished from Ranchos de Taos, NM, four days later on June 26, 2025 — another defense-connected woman who left behind her phones and walked into the wilderness
• Geographic cluster: Reza vanished in LA County; Carl Grillmair was shot dead in LA County (Feb 2026); McCasland vanished in Albuquerque (Feb 2026); three Wright-Patterson employees dead in Ohio (Oct 2025). Southern California, New Mexico, Ohio — the three geographic nodes of American defense aerospace research

The AFRL Cluster (June 2025 – February 2026)

Nine people connected to AFRL or the institutions it funds, dead or missing in nine months:

1. Monica Jacinto Reza — Mondaloy inventor, AFRL-funded contractor, JPL. Vanished June 22, 2025
2. Melissa Casias — LANL employee, DOE advisory board. Vanished June 26, 2025
3. Jacob Prichard — AFRL Sensors Directorate. Dead October 25, 2025
4. Jaymee Prichard — AFLCMC, Wright-Patterson. Dead October 25, 2025
5. 1st Lt. Jaime Gustitus — AFRL 711th Human Performance Wing, TS/SCI. Dead October 25, 2025
6. Carl Grillmair — Caltech/IPAC, NEOWISE pipeline, NEO Surveyor. Shot dead February 16, 2026
7. William Neil McCasland — Former AFRL Commander. Vanished February 27, 2026

Six separate jurisdictions. Zero cross-referencing mandate. Nobody is looking at this list as a list.

The Counterargument

• Hikers go missing in the Angeles National Forest regularly; the terrain is steep, rugged, and can be fatal — a fall into a deep ravine could leave a small-framed person (4'11", 101 lbs) unrecoverable
• FLIR thermal imaging has known limitations in mountainous terrain with sun-heated rock faces, tree canopy, and variable wind; a negative FLIR result does not prove a body was not present
• The Find a Grave memorial could have been created by an overzealous acquaintance or someone who assumed the worst — "green burial" may reflect a misunderstanding or the contributor's speculation, not insider knowledge
• Subject A's behavioral inconsistencies (distance estimates, directional confusion) may reflect the stress and confusion of a traumatic event rather than deception
• The institutional silence from JPL, NASA, and AIAA may reflect standard organizational policy against commenting on employees' personal tragedies rather than a coordinated cover-up
• Reza's move from Aerojet Rocketdyne to JPL under her family name could simply reflect a career change and personal preference after her former employer was acquired by L3Harris

See Also

• William Neil McCasland — Former AFRL commander who funded Mondaloy. Missing since Feb 2026
• Dallis Hardwick — Co-inventor of Mondaloy, Reza's mentor. Died 2014
• Carl Grillmair — Caltech/IPAC astronomer in same institutional family as JPL. Shot dead Feb 2026
• Melissa Casias — LANL employee who vanished 4 days after Reza
• Jacob Prichard — AFRL employee, perpetrator of Wright-Patterson triple death
• Jaime Gustitus — AFRL officer, TS/SCI cleared, killed Oct 2025
• Jaymee Prichard — AFLCMC employee, killed Oct 2025
• Monica Jacinto Reza (UAP Deaths project) — Parallel profile in UAP Deaths project

Other Shocking Stories

• John S. Kanzius: Discovered radio waves could ignite salt water. Penn State verified it. Research stalled after his death.
• Frank Richardson: Nevada Test Site electrician invented a fuelless magnetic generator. Threatened repeatedly. Died under unclear circumstances.
• Viktor Schauberger: Forced to work on Nazi flying disc designs. Signed away all rights to U.S. consortium. Dead five days later.
• Gerald Schaflander: Solar hydrogen fuel inventor received death threats to his elderly mother. Convicted of mail fraud in 1982.

Sources

• SpaceNews: "What is Mondaloy and why should you care?" (Dec 2017)
• Google Patents: US 2010/0266442 A1 — "Burn-Resistant and High Tensile Strength Metal Alloys"
• Find a Grave: Monica Jacinto Reza (1964–2025)
• KTLA: Missing hiker: Teams enter day 6 of search
• CBS Los Angeles: Search continues for missing hiker
• Crescenta Valley Weekly: Update On Efforts to Locate Missing Hiker Monica Reza
• The Sentinel Briefing: THE GREEN BURIAL — She Was Declared Dead Four Days After She Vanished
• The Sentinel Briefing: THE LONG COUNT — We Started With Two Names. The List Didn't Stop.
• Defense News: How the US replaced Russia's RD-180 engine
• EISPIRATEN hiking forum — independent timeline reconstruction
• Reddit r/socalhiking — discussion threads on Reza disappearance
• Websleuths: Monica Reza, 60, hiker, Mount Waterman
• Boeing: Two Boeing Employees Receive National Recognition (2004 HENAAC Luminary Award)
• NewsNation: William McCasland search — ex-colleague Monica Reza went missing months before him
• Solve the Case: MISSING — Monica Reza
• L3Harris completes Aerojet Rocketdyne acquisition (July 2023)
• Cal State LA Dean's Advisory Board (current — lists "Monica Reza, JPL NASA")

Social Media Coverage

Reza's disappearance has been widely discussed on X.com as part of the AFRL cluster pattern:

• @HappyLo222 (March 22, 2026) — "Monica Jacinto Reza (aerospace/materials engineer, Aerojet Rocketdyne then JPL/NASA links): Co-inventor of Mondaloy, a patented nickel-based 'super-alloy'... Disappeared June 22, 2025, while hiking in Angeles National Forest, CA — last seen waving to companions ~30 feet away; body never found despite extensive searches"
• @BowesChay (March 23, 2026) — "Aerospace engineer Monica Jacinto Reza, co inventor of advanced rocket alloy Mondaloy with NASA and Air Force ties she disappeared while hiking in June 2025 her body never found" (985 likes, 22,493 views)
• @rogue185263 (March 22, 2026) — "At least six individuals tied to a U.S. defense research network are now dead or missing within a year, including aerospace engineer Monica Jacinto Reza"

This information was built by Grok and Claude AI research.